Name: Capillary action and why we see a meniscus | Chemistry | Khan Academy @khanacademy
Uploaded: 2024-10-21T08:17:00-05:00
Duration: 8 min 17 s
Description: Capillary action and why we see a meniscus | Chemistry | Khan Academy

Capillary action and why we see a meniscus | Chemistry | Khan Academy

Khan Academy 2024-10-21 | Capillary action and why we see a meniscus | Chemistry | Khan Academy

How to subtract mixed numbers that have unlike denominators | Fractions | Pre-Algebra | Khan Academy

Khan Academy 2024-10-17 | Learn how to subtract 3 and 2/5 from 7 and 6/9.

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Pre-Algebra on Khan Academy: No way, this isn't your run of the mill arithmetic. This is Pre-algebra. You're about to play with the professionals. Think of pre-algebra as a runway. You're the airplane and algebra is your sunny vacation destination. Without the runway you're not going anywhere. Seriously, the foundation for all higher mathematics is laid with many of the concepts that we will introduce to you here: negative numbers, absolute value, factors, multiples, decimals, and fractions to name a few. So buckle up and move your seat into the upright position. We're about to take off!

About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.

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Proportional reasoning with motion | AP Physics 1 | Khan Academy

Khan Academy 2024-10-04 | Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! khanacademy.org/science/ap-college-physics-1/xf557a762645cccc5:kinematics/xf557a762645cccc5:mathematical-models-of-motion/v/proportional-reasoning-with-motion

Different motion scenarios can be compared using proportional reasoning. Even if exact values aren't known for each value, the factor of change in one variable can be used to predict the factor of change in another.

Sections:
00:00 - Intro
00:54 - Comparing average velocity
05:08 - Comparing acceleration
08:51 - Comparing distance travelled

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Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

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Dealing cards with functions | Intro to CS - Python | Khan Academy

Khan Academy 2024-10-03 | Apply functions and nested function calls to deal a deck of cards. Design a set of function definitions that can draw hands, draw cards, and pick random suits. View the program used in this video at: khanacademy.org/python-program/functions-program-design-deck-of-cards/5630188991201280

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now with our Intro to Computer Science - Python course!

Course link: khanacademy.org/computing/intro-to-python-fundamentals/x5279a44ae0ab15d6:playing-games-with-functions
Course playlist: youtube.com/playlist?list=PLSQl0a2vh4HDkbhG0sDW0b-VZXykEIAe5

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

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TIMESTAMPS:
00:00 - 00:13 : problem statement
00:14 - 00:30 : stubbing out the draw_card() function
00:31 - 01:19 : accumulating a hand of cards
01:20 - 01:50 : formatting with the newline character
01:51 - 02:35 : picking a random suit
02:36 - 03:08 : picking a random rank
03:09 - 04:02 : reading a multi-level stack trace
04:03 - 04:52 : passing in a boolean parameter
04:53 - 05:24 : program limitations

Developing kinematic equations from data | AP Physics 1 | Khan Academy

Khan Academy 2024-10-01 | Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! khanacademy.org/science/ap-college-physics-1/xf557a762645cccc5:kinematics/xf557a762645cccc5:mathematical-models-of-motion/v/developing-kinematic-equations-from-data

Experimental data for an object moving with constant acceleration can be used to develop the kinematic equations. See how this can be accomplished using a process called linearization.

Sections:
00:00 - Intro
00:30 - What is a mathematical model?
01:26 - The first kinematic equation
05:26 - The second kinematic equation
08:10 - Linearization
09:27 - The third kinematic equation

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Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

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Nested function calls | Intro to CS - Python | Khan Academy

Khan Academy 2024-10-01 | What happens when a function calls another function? Trace how the computer uses stack frames to keep track of each function call's state. Explore how breaking down a big function into several smaller functions can improve readability and reusability. View the program used in this video at: khanacademy.org/python-program/intruder-detection/6531095526293504

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now with our Intro to Computer Science - Python course!

Course link: khanacademy.org/computing/intro-to-python-fundamentals/x5279a44ae0ab15d6:playing-games-with-functions
Course playlist: youtube.com/playlist?list=PLSQl0a2vh4HDkbhG0sDW0b-VZXykEIAe5

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

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TIMESTAMPS:
00:00 - 00:21 : function execution review
00:22 - 01:21 : tracing a nested function call
01:22 - 01:55 : managing multiple stack frames
01:56 - 02:34 : game setup - intruder detection!
02:35 - 03:42 : why not use one big function?
03:43 - 04:51 : breaking down into smaller functions
04:52 - 05:25 : decoupling the detection check
05:26 - 06:23 : reusing function building blocks

Constitution 101 - Start the free course today!

Khan Academy 2024-09-27 | Join Khan Academy founder Sal Khan National and the National Constitution Center President and CEO Jeffrey Rosen as they tell you why they're thrilled to introduce the Constitution 101 student course developed in partnership with the Khan Academy and the National Constitution Center.

This student-mastery course is designed to empower students with a deeper understanding of the Constitution and its impact on their lives. The course will explore the importance of civil dialogue, how to think like a constitutional scholar, and address timely constitutional questions related to student free speech, AI, and elections.

Start the course today! - www.khanacademy.org/humanities/constitution-101

How to Use Khan Academys Free Courses for Texas Teachers and Students

Khan Academy 2024-09-26 | Want to bring Khan Academy to your Texas district? Visit districts.khanacademy.org

Local and global scope | Intro to CS - Python | Khan Academy

Khan Academy 2024-09-25 | Can I name the variable inside my function the same as a variable outside my function? Trace a function call to explore how the computer uses global and local scopes to separate regions of memory. Examine why functions use arguments and return values to pass information, instead of directly updating global variables. View the program used in this video at: khanacademy.org/python-program/fall-damage/6406651516469248

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now with our Intro to Computer Science - Python course!

Course link: khanacademy.org/computing/intro-to-python-fundamentals/x5279a44ae0ab15d6:playing-games-with-functions
Course playlist: youtube.com/playlist?list=PLSQl0a2vh4HDkbhG0sDW0b-VZXykEIAe5

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

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TIMESTAMPS:
00:00 - 00:38 : global scope
00:39 - 01:25 : local scope
01:26 - 01:55 : passing back information with the return value
01:56 - 02:57 : why does Python use local scope?
02:58 - 03:43 : name resolution
03:44 - 04:22 : passing in information with parameters
04:23 - 04:55 : summary

I can’t imagine teaching without Khanmigo.”

Khan Academy 2024-09-23 | Oklahoma high school teacher Mr. Foos says he can’t imagine teaching without Khanmigo, Khan Academy’s 100% free AI-powered teaching assistant. He asks, “how did teachers in the past ever function without it?”

Get Khanmigo for teachers for free at khanmigo.ai/teach

Tracing function calls | Intro to CS - Python | Khan Academy

Khan Academy 2024-09-18 | How does the computer execute a function call? Learn how the computer uses stack frames to separate its memory during function execution. Trace a program step-by-step to see how arguments get passed into a function call and how return values get passed out. View the program used in this video at: khanacademy.org/python-program/villager-greetings/5415007350603776

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now with our Intro to Computer Science - Python course!

Course link: khanacademy.org/computing/intro-to-python-fundamentals/x5279a44ae0ab15d6:playing-games-with-functions
Course playlist: youtube.com/playlist?list=PLSQl0a2vh4HDkbhG0sDW0b-VZXykEIAe5

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

Donate or volunteer today! Donate here: khanacademy.org/donate?utm_source=youtube&utm_medium=desc

Volunteer here: khanacademy.org/contribute?utm_source=youtube&utm_medium=desc

TIMESTAMPS:
00:00 - 00:57 : reading the function definition
00:58 - 01:17 : global variable assignment
01:18 - 01:46 : calling the function
01:59 - 02:42 : stack frames
02:43 - 03:39 : returning a value
03:40 - 04:31 : second function call
04:32 - 05:01 : ignoring the return value
05:02 - 05:33 : terminating the program

Primitive data types | Intro to CS - Python | Khan Academy

Khan Academy 2024-09-18 | Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now with our Intro to Computer Science - Python course!

Speed through the basics of integers, floats, booleans, and strings. We can create all other types of program data by composing just these four primitive data types!

Course link: khanacademy.org/computing/intro-to-python-fundamentals/x5279a44ae0ab15d6:computational-thinking-with-variables
Course playlist: youtube.com/playlist?list=PLSQl0a2vh4HDkbhG0sDW0b-VZXykEIAe5

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

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The elements of a poem | Reading | Khan Academy

Khan Academy 2024-09-16 | Let's talk about how poems work! Poetry is a special kind of writing—if ordinary writing is like talking, then poetry is like singing. This video will describe the parts of poems, and how to think about them.

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

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Functions | Intro to CS - Python | Khan Academy

Khan Academy 2024-09-13 | How can we reuse a code routine over and over again? Learn how to use functions to package a block of code and parameters to generalize it. Learn how to write your own function definitions, and explore how the computer executes a function call. View the program used in this video at: khanacademy.org/python-program/health-potions/4851312333602816

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now with our Intro to Computer Science - Python course!

Course link: khanacademy.org/computing/intro-to-python-fundamentals/x5279a44ae0ab15d6:playing-games-with-functions
Course playlist: youtube.com/playlist?list=PLSQl0a2vh4HDkbhG0sDW0b-VZXykEIAe5

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

Donate or volunteer today! Donate here: khanacademy.org/donate?utm_source=youtube&utm_medium=desc

Volunteer here: khanacademy.org/contribute?utm_source=youtube&utm_medium=desc

TIMESTAMPS:
00:00 - 00:16 : code duplication
00:17 - 00:43 : what is a function?
00:44 - 01:10 : function inputs and outputs
01:11 - 02:24 : function definition syntax
02:25 - 03:17 : calling a function
03:18 - 03:54 : refactoring a program into functions
03:55 - 04:41 : why use functions?

Electron configurations with the periodic table | Chemistry | Khan Academy

Khan Academy 2024-09-12 | Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!

khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:atomic-models-and-periodicity/x2613d8165d88df5e:the-quantum-model/v/electron-configurations-with-the-periodic-table

The periodic table is organized by grouping elements with similar chemical properties and electron structures. An element's location on the table can be used to determine its electron configuration. By following the order of periods (rows) and blocks (s, p, d, f), you can trace how electrons fill the atom's orbitals and efficiently determine the distribution of electrons in an atom.

Sections:
00:00 - Introduction
00:45 - Periodic table layout - periods and groups
02:10 - Period and valence shell number
02:52 - s, p, d, and f block elements
04:25 - Finding the number of valence electrons
05:38 - Modified periodic table for writing electron configurations
06:14 - Electron configuration of hydrogen, helium, & lithium
07:47 - Electron configuration of carbon & chlorine
09:33 - Electron configuration of d-block elements
12:58 - Noble gas shorthand

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

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Molecular polarity | Chemistry | Khan Academy

Khan Academy 2024-09-12 | Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!

khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:states-of-matter/x2613d8165d88df5e:electronegativity-and-bond-polarity/v/molecular-polarity

Molecular polarity is determined not just by individual polar bonds, but by the molecule’s 3D shape. Even if bonds are polar, the overall molecule may be nonpolar if the shape cancels out the dipoles. Whether a molecule is polar or not influences properties like solubility, boiling points, and intermolecular interactions.

Sections:
00:00 - Introduction
00:17 - Covalent bonds, electronegativity & polar bonds
01:55 - Why is carbon dioxide nonpolar?
03:52 - Polar bonds don't necessarily mean polar molecules!
04:34 - Why is water polar?
06:33 - ESP maps & symmetry
07:30 - Worked examples: CCl4 & CH3Cl
11:16 - Molecular polarity in larger molecules
13:07 - Intermolecular vs Intramolecular forces

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

Donate or volunteer today! Donate here: donate.khanacademy.org/give/419869/#!/donation/checkout

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Calculations using Avogadros number (part 2) | Chemistry | Khan Academy

Khan Academy 2024-09-09 | Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!

khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:stoichiometry-and-the-mole/x2613d8165d88df5e:mole-calculations/v/calculations-using-avogadro-s-number-part-2

Practice converting from grams to moles to molecules, formula units, and atoms through these four example problems. Grams are the standard unit of mass in the laboratory, while moles are used in calculations to relate mass to the number of particles. This system of units allows for communication between the microscopic world of atoms and the macroscopic world we interact with daily.

Sections:
00:00 - Convert moles to molecules of glucose
03:07 - Convert moles to number of hydrogen atoms in glucose
06:29 - What is a formula unit?
08:40 - Convert mass to moles to formula units in CaCO3
12:49 - Calculate the number of oxygen atoms from moles of CaCO3

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

Donate or volunteer today! Donate here: donate.khanacademy.org/give/419869/#!/donation/checkout

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Calculations using Avogadros number (part 1) | Chemistry | Khan Academy

Khan Academy 2024-09-09 | Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!

khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:stoichiometry-and-the-mole/x2613d8165d88df5e:moles-and-molar-mass/v/calculations-using-avogadro-s-number-part-1

Atomic mass units (a.m.u.) are much smaller than grams and are used to measure atomic-scale masses. Avogadro's number (6.022 x 10²³) represents the quantity of particles in one mole, linking atomic masses to measurable amounts in grams. Molar mass, expressed in grams per mole, bridges these concepts, enabling the conversion between the mass of a substance and the amount in moles.

Sections:
00:00 - Introduction
00:25 - What is an Atomic mass unit (amu or u)
04:20 - Avogadro's number and the mole
08:12 - Molar mass
10:28 - Calculating the number of atoms in a sample
11:29 - Calculating the molar mass of CO2

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

Donate or volunteer today! Donate here: donate.khanacademy.org/give/419869/#!/donation/checkout

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Games and modularity | Intro to CS - Python | Khan Academy

Khan Academy 2024-09-07 | How do programmers build games with thousands of lines of code? Learn how programmers use modularity to break down a problem into smaller subproblems. Recognize why organizing code into modules and functions allows for better reusability, testability, and readability.

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now with our Intro to Computer Science - Python course!

Course link: khanacademy.org/computing/intro-to-python-fundamentals/x5279a44ae0ab15d6:playing-games-with-functions
Course playlist: youtube.com/playlist?list=PLSQl0a2vh4HDkbhG0sDW0b-VZXykEIAe5

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

Donate or volunteer today! Donate here: khanacademy.org/donate?utm_source=youtube&utm_medium=desc

Volunteer here: khanacademy.org/contribute?utm_source=youtube&utm_medium=desc

TIMESTAMPS:
00:00 - 00:25 : thousands of lines of code
00:26 - 01:02 : breaking down a game
01:03 - 01:27 : solving a subproblem
01:28 - 01:55 : collaborating with other programmers
01:56 - 02:43 : testing individual components
02:44 - 03:41 : grouping functionality into modules
03:42 - 04:03 : writing our own functions

Double replacement reactions | Chemistry | Khan Academy

Khan Academy 2024-09-04 | Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!

khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:solutions-acids-and-bases/x2613d8165d88df5e:solubility/v/double-replacement-reactions

Double replacement reactions occur when two compounds exchange ions, forming two new compounds. The driving force in these reactions is often the formation of a precipitate, a gas, or water. A solubility chart is commonly used to predict whether a potential product will be insoluble and therefore precipitate out of solution. This allows us to determine if the reaction will actually occur.

Sections:
00:00 - Experimenting with aqueous NaCl and AgNO3
01:13 - Visual explanation of a double replacement reaction
03:13 - Are double replacement reactions also redox reactions?
04:21 - Driving force in double replacement reactions - precipitation
05:42 - General form of double displacement reactions
06:25 - Understanding a solubility chart
07:34 - Using a solubility chart
10:35 - Acid base neutralizations

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

Donate or volunteer today! Donate here: donate.khanacademy.org/give/419869/#!/donation/checkout

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BIG Emotions! Help Kids Identify Feelings With New Lessons From Khan Academy Kids

Khan Academy 2024-09-03 | Life’s BIG moments come with BIG feelings! The @KhanAcademyKids team is here to help with a new set of lessons all about emotions. Open the free Khan Academy Kids app to play games that help kids manage feelings like happiness, sadness, and everything in between. Join Kodi the Bear to make a face, or practice calming scary thoughts by naming feelings. Expressive artwork, cute new emojis, and playful animations help little learners begin the journey of social-emotional development in a fun and engaging way.

The new lessons are available for PreK-2nd grade and cover emotions like disappointment, embarrassment, excitement, boredom, and more. To see the new lessons, download the FREE Khan Academy Kids app on Apple, Google Play, or Amazon app stores and go to the Logic+ tab.

➡️ go.learn.khanacademy.org/khanacademy/YouTube

A world of emotions awaits! 😍

Visit us at khankids.org to learn more about Khan Academy Kids, a free educational app for preschool through 2nd grade.

Questions? We’d be happy to help! Please contact our team at khankids@khanacademy.org.

Five reasons to use Khan Academys Intro to CS course #computerscience #educators

Khan Academy 2024-08-28 | 🧑‍🏫 Hey, teachers! Looking for a computer science curriculum to use in your classroom? Try Khan Academy's new Intro to CS - Python course!

🕗 Reclaim your prep time with our extensive library of Python practice materials. Each new concept comes with in-depth instructional videos, interactive example programs, code reading exercises, worked examples, and scaffolded programming challenges. Our platform gives students instant feedback to keep them moving, so you can spend more time on the big questions and less time on the small stuff.

🐍 Check out our Intro to Computer Science - Python course now!
khanacademy.org/computing/intro-to-python-fundamentals

Writing a quadratic function to fit data and estimate solutions | Algebra 1 (TX TEKS) | Khan Academy

Khan Academy 2024-08-26 | "Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!
khanacademy.org/math/algebra-1-tx/x36b5a29ce1c3a684:investigation-and-application-of-exponential-functions/x36b5a29ce1c3a684:writing-quadratics-to-fit-data/v/writing-a-quadratic-function-to-fit-data-estimate-solutions-and-make-predictions

Practice writing quadratic functions to fit data, estimate solutions and make predictions from a table of values and application.

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

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Graphing arithmetic sequences | Algebra I (TX TEKS) | Khan Academy

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Given the an arithmetic sequence, graph the function using a table of values.

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Graphing geometric sequences | Algebra 1 (TX TEKS) | Khan Academy

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khanacademy.org/math/algebra-1-tx/x36b5a29ce1c3a684:arithmetic-and-geometric-sequences-tx-teks/x36b5a29ce1c3a684:graphing-arithmetic-and-geometric-sequences/v/graphing-geometric-sequences

Connecting existing knowledge of geometric sequences expressed in recursive function form to their representation graphically.

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

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Adding and subtracting polynomials of degree one | Algebra 1 (TX TEKS) | Khan Academy

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Expand previous knowledge of combining like terms to this new context with more than one variable.

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

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Adding and subtracting polynomials of degree two | Algebra 1 (TX TEKS) | Khan Academy

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When given two polynomials of degree two, add or subtract to simplify.

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

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Determining and representing the domain and range of exponential functions | Khan Academy

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khanacademy.org/math/algebra-1-tx/x36b5a29ce1c3a684:arithmetic-and-geometric-sequences/x36b5a29ce1c3a684:identifying-key-features-of-exponential-functions/v/determining-and-representing-the-domain-and-range-of-exponential-functions

Given an exponential function of the form f(x) = a*b^x in algebraic or graphed form, determine its domain and range.

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

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Determining the effects on f(x) = x (multiple transformations) | Algebra 1 (TX TEKS) | Khan Academy

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Determine the effects on f(x) = x with multiple transformations.

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

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Determining the effects on f(x) = x when replaced by af(x) or f(bx) | Khan Academy

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Determine the effects on f(x) when replaced by af(x) or f(bx).

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

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Determining the effects on f(x) = x when replaced by f(x) + d or f(x - c) | Khan Academy

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Determine the effects on f(x) = x when replaced by f(x) + d or f(x - c).

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

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Dividing polynomials of degree one | Algebra 1 (TX TEKS) | Khan Academy

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Expand previous knowledge of division to this new context involving more than one term. With and without remainders are in the exercise, so the video should cover remainders.

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

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Domain and range from graphs of quadratic and exponential functions | Khan Academy

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khanacademy.org/math/algebra-1-tx/x36b5a29ce1c3a684:introduction-to-functions/x36b5a29ce1c3a684:domain-and-range-with-inequalities/v/domain-and-range-from-graphs-of-quadratic-and-exponential-functions

Compare and contrast domain and range given graphs of partial quadratic and exponential functions, where the ends of the shown graph vary among points, and arrows.

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

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Domain and range of lines, segments, and rays | Algebra 1 (TX TEKS) | Khan Academy

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Compare and contrast domain and range given graphs of line segment and line.

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

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Identifying key features of exponential functions | Algebra 1 (TX TEKS) | Khan Academy

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When given an exponential function, identify key features.

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

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Rewriting a quadratic function from vertex form to standard form | Khan Academy

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Given a quadratic function in vertex form, rewrite it in standard form.

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

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Rewriting expressions with exponents challenge 1 | Algebra 1 (TX TEKS) | Khan Academy

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Expand previous knowledge of isolated exponent rules to rewriting expressions using multiple rules in the same problem.

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

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Rewriting expressions with exponents challenge 2 | Algebra 1 (TX TEKS) | Khan Academy

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Expand previous knowledge of isolated exponent rules to rewriting expressions using multiple rules in the same problem.

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

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Writing a quadratic function from a graph | Algebra 1 (TX TEKS) | Khan Academy

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khanacademy.org/math/algebra-1-tx/x36b5a29ce1c3a684:investigation-and-application-of-exponential-functions/x36b5a29ce1c3a684:writing-quadratics-from-solutions/v/writing-a-quadratic-function-from-a-graph

When given a graph of a quadratic function, write its equation.

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

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Writing a quadratic function from solutions | Algebra 1 (TX TEKS) | Khan Academy

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When given the real solutions of a quadratic function, write its equation.

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

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Writing a quadratic when given the vertex and another point | Algebra 1 (TX TEKS) | Khan Academy

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Given the vertex of a quadratic function and another point on the graph, write the equation for that function in vertex form.

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

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Writing linear equations in two variables given a table | Algebra 1 (TX TEKS) | Khan Academy

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When given a table of values, write the linear equation that represents this data in slope-intercept form.

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

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Single replacement reactions | Chemistry | Khan Academy

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When one element replaces another element in a compound, we call it a single replacement reaction. In these reactions, one atom loses electrons (oxidation) while another element gains those electrons (reduction), making them a form of a redox reaction. Learn to use the Activity Series, which ranks elements by their reactivity and helps predict if the reaction will occur.

Sections:
00:00 - Intro
00:38 - Copper in silver nitrate
01:22 - What is single replacement rxn?
01:58 - What causes single replacement rxn?
03:48 - Oxidation & reduction
04:47 - Why doesn't gold react with silver nitrate?
05:47 - Activity series
06:49 - Example 1 (Zinc in copper sulphate)
08:37 - Example 2 (Silver in zinc sulphate)
09:40 - Example 3 (Magnesium in HCl)
11:16 - Why are acids stored in glass containers?
11:58 - Anionic single replacement rxns

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

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Welcome to Intro to Computer Science! | Intro to CS - Python | Khan Academy

Khan Academy 2024-08-22 | Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now with our Intro to Computer Science - Python course!

Is Khan Academy's Intro to CS - Python course right for you? Hear from the creator about how they designed this course, why everyone should learn to program, and what makes this course unique. In this course, you'll learn the fundamentals of programming from variables, to conditionals, loops, functions, and data structures as you apply programming to solve a diverse range of problems!

Course link: khanacademy.org/computing/intro-to-python-fundamentals
Course playlist: youtube.com/playlist?list=PLSQl0a2vh4HDkbhG0sDW0b-VZXykEIAe5

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

Donate or volunteer today! Donate here: khanacademy.org/donate?utm_source=youtube&utm_medium=desc

Volunteer here: khanacademy.org/contribute?utm_source=youtube&utm_medium=desc

Contents:
00:00 - 00:50 : what will I learn in this course?
00:51 - 01:38 : why should I learn computer science?
01:39 - 01:58 : who is this course for?
01:59 - 02:50 : what's unique about this course?
02:51 - 03:52 : why did you create this course?

Learn to code in 60 seconds #programming #computerscience #python #khanacademy

Khan Academy 2024-08-21 | 🏃‍♀️ Ready for a 60 second programming crash course? Speed through the basics of Python data types, variables, conditionals, loops, functions, and data structures.

👩‍💻 You'll probably need a bit more time to master programming, so take it at your own pace with Khan Academy's new Intro to Computer Science - Python course!

📹 Each new programming concept comes with in-depth instructional videos, interactive example programs, code reading exercises, worked examples, and scaffolded programming practice that gives instant feedback!

🐍 Start your Python programming journey now:
khanacademy.org/computing/intro-to-python-fundamentals

How I learned to code on Khan Academy #python #programming #code #learning #khanacademy

Khan Academy 2024-08-21 | 👩‍💻 Want to learn how to code? Try our new Intro to Computer Science - Python course!

🌎 Our hands-on course introduces CS through a series of projects that demonstrate the exciting ways programming can be applied to real-world problems, from building recommendation engines to modeling infectious diseases.

📹 Each new programming concept comes with in-depth instructional videos, interactive example programs, code reading exercises, worked examples, and scaffolded programming practice that gives instant feedback!

🐍 Start your Python programming journey now:
khanacademy.org/computing/intro-to-python-fundamentals

New Hampshire Summer Learning Series Session 5: Writing Coach

Khan Academy 2024-08-20 | Learn more about supporting students and teachers with Khanmigo at districts.khanacademy.org/khanmigo and be sure to try it out yourself at khanmigo.ai/teachers.

Learn more about Khan Academy's partnership with the State of New Hampshire on our blog: blog.khanacademy.org/announcing-free-khanmigo-for-new-hampshire

Solving two-step word problems with decimals (adding and subtracting) | Khan Academy

Khan Academy 2024-08-20 | Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!
khanacademy.org/math/grade-5-math-tx/x630b35db1de6a0df:subtracting-decimals/x630b35db1de6a0df:adding-and-subtracting-decimals-word-problems/v/solving-two-step-word-problems-with-decimals-adding-and-subtracting

Practice solving two-step word problems that involve decimals. Use different strategies that either add and subtract, subtract then subtract, or subtract and then add.

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

Donate or volunteer today! Donate here: khanacademy.org/donate?utm_source=youtube&utm_medium=desc

Volunteer here: khanacademy.org/contribute?utm_source=youtube&utm_medium=desc

Rounding decimals to the hundredths on the number line | Grade 5 (TX TEKS) | Khan Academy

Khan Academy 2024-08-20 | Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!
khanacademy.org/math/grade-5-math-tx/x630b35db1de6a0df:decimal-place-value/x630b35db1de6a0df:rounding-decimals/v/rounding-decimals-to-the-hundredths-on-the-number-line

Practice rounding decimals on a vertical number line. First, start by identifying where a point rounds on a number line given a place value. Then, use a number line with three given points to find which point rounds to a given decimal.

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

Donate or volunteer today! Donate here: khanacademy.org/donate?utm_source=youtube&utm_medium=desc

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Multiplying 3-digit by 2-digit numbers | Grade 5 (TX TEKS) | Khan Academy

Khan Academy 2024-08-20 | Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!
khanacademy.org/math/grade-5-math-tx/x630b35db1de6a0df:extending-whole-number-operations/x630b35db1de6a0df:multi-digit-multiplication/v/3-digit-by-2-digit-multiplication-example

Multiply 3 digit by 2 digit whole numbers to find a product using the standard algorithm.

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

Donate or volunteer today! Donate here: khanacademy.org/donate?utm_source=youtube&utm_medium=desc

Volunteer here: khanacademy.org/contribute?utm_source=youtube&utm_medium=desc

Estimating decimal subtraction (thousandths) | Grade 5 (TX TEKS) | Khan Academy

Khan Academy 2024-08-20 | Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!
khanacademy.org/math/grade-5-math-tx/x630b35db1de6a0df:subtracting-decimals/x630b35db1de6a0df:subtracting-decimals-intro/v/estimating-decimal-subtraction

Practice using estimation on a number line to help as a strategy for multiplying two decimals, up to the thousandths place.

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

Donate or volunteer today! Donate here: khanacademy.org/donate?utm_source=youtube&utm_medium=desc

Volunteer here: khanacademy.org/contribute?utm_source=youtube&utm_medium=desc