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Money creation in a fractional reserve system | Financial sector | AP Macroeconomics | Khan Academy
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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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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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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
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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
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!
Donate here: khanacademy.org/donate?utm_source=youtube&utm_medium=desc
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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
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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
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
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 - 00:38 : 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
Get Khanmigo for teachers for free at khanmigo.ai/teach
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
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!
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
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
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?
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!
Donate or volunteer today! Donate here: donate.khanacademy.org/give/419869/#!/donation/checkout
Volunteer here: khanacademy.org/contribute?utm_source=youtube&utm_medium=desc
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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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!
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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
Volunteer here: khanacademy.org/contribute?utm_source=youtube&utm_medium=desc
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
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!
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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.
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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.
🕗 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
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!
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"
khanacademy.org/math/algebra-1-tx/x36b5a29ce1c3a684:arithmetic-and-geometric-sequences-tx-teks/x36b5a29ce1c3a684:graphing-arithmetic-and-geometric-sequences/v/graphing-arithmetic-sequences
Given the an arithmetic sequence, graph the function using a table of values.
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"
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!
Donate or volunteer today! Donate here: khanacademy.org/donate?utm_source=youtube&utm_medium=desc
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khanacademy.org/math/algebra-1-tx/x36b5a29ce1c3a684:linear-expressions-equations-and-inequalities/x36b5a29ce1c3a684:add-and-subtract-polynomials-of-degree-one/v/adding-and-subtracting-polynomials-of-degree-one
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!
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
khanacademy.org/math/algebra-1-tx/x36b5a29ce1c3a684:properties-of-expressions-and-factoring/x36b5a29ce1c3a684:add-and-subtract-polynomials-of-degree-one-and-two/v/adding-and-subtracting-polynomials-of-degree-two
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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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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khanacademy.org/math/algebra-1-tx/x36b5a29ce1c3a684:investigation-of-linear-functions-and-inequalities-with-two-variables/x36b5a29ce1c3a684:function-transformations/v/determining-the-effects-on-fx-x-multiple-transformations
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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khanacademy.org/math/algebra-1-tx/x36b5a29ce1c3a684:investigation-of-linear-functions-and-inequalities-with-two-variables/x36b5a29ce1c3a684:function-transformations/v/determining-the-effects-on-fx-x-when-replaced-by-afx-or-fbx
Determine the effects on f(x) when replaced by af(x) or f(bx).
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khanacademy.org/math/algebra-1-tx/x36b5a29ce1c3a684:investigation-of-linear-functions-and-inequalities-with-two-variables/x36b5a29ce1c3a684:function-transformations/v/determining-the-effects-on-fx-x-when-replaced-by-fx-d-or-fx-c
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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khanacademy.org/math/algebra-1-tx/x36b5a29ce1c3a684:linear-expressions-equations-and-inequalities/x36b5a29ce1c3a684:divide-polynomials-of-degree-one/v/dividing-polynomials-of-degree-one
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.
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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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khanacademy.org/math/algebra-1-tx/x36b5a29ce1c3a684:introduction-to-functions/x36b5a29ce1c3a684:domain-and-range-with-inequalities/v/domain-and-range-of-lines-segments-and-rays
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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khanacademy.org/math/algebra-1-tx/x36b5a29ce1c3a684:arithmetic-and-geometric-sequences/x36b5a29ce1c3a684:identifying-key-features-of-exponential-functions/v/identifying-key-features-of-exponential-functions
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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khanacademy.org/math/algebra-1-tx/x36b5a29ce1c3a684:investigation-and-application-of-exponential-functions/x36b5a29ce1c3a684:writing-quadratics-from-vertex/v/rewriting-a-quadratic-function-from-vertex-form-to-standard-form
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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khanacademy.org/math/algebra-1-tx/x36b5a29ce1c3a684:properties-of-exponents/x36b5a29ce1c3a684:simplify-rational-exponents/v/rewriting-expressions-with-exponents-challenge-1
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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khanacademy.org/math/algebra-1-tx/x36b5a29ce1c3a684:properties-of-exponents/x36b5a29ce1c3a684:simplify-rational-exponents/v/exponent-rule-challenge-2
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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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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khanacademy.org/math/algebra-1-tx/x36b5a29ce1c3a684:investigation-and-application-of-exponential-functions/x36b5a29ce1c3a684:writing-quadratics-from-solutions/v/writing-a-quadratic-function-from-solutions
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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khanacademy.org/math/algebra-1-tx/x36b5a29ce1c3a684:investigation-and-application-of-exponential-functions/x36b5a29ce1c3a684:writing-quadratics-from-vertex/v/writing-a-quadratic-when-given-the-vertex-and-another-point
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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khanacademy.org/math/algebra-1-tx/x36b5a29ce1c3a684:investigation-of-linear-functions-and-inequalities-with-two-variables/x36b5a29ce1c3a684:writing-linear-equations-from-tables/v/writing-linear-equations-in-two-variables-given-a-table
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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khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:chemical-reactions/x2613d8165d88df5e:types-of-chemical-reactions/v/single-replacement-reactions
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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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!
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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?
👩💻 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
🌎 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
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
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!
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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!
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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!
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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!
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