Code.org Lesson 3.4A Lists Practice | Tutorial with Answers

Uploaded September 2025 | Updated September 2026, 3 weeks ago

Lists Practice is Lesson 3 of Unit 6, Lists, Loops, and Traversals, in the Code.org Computer Science Principles course, now known as CodeAI. This course is commonly used in AP Computer Science Principles classrooms. In this tutorial, I walk through the activity step by step, explain the computer science concepts involved, and show how to arrive at the correct solution.

Lesson playlist: youtube.com/playlist?list=PLbsvRhEyGkKdZ5rVURA_tp1osB-bZsWsF
Unit 6 playlist: youtube.com/playlist?list=PLbsvRhEyGkKdgJMsglJeEYIynDpthpOZB

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