Lesson 4 — Count Steps, Choose Wisely (Intro to Big-O)
⏱ 25–35 minutes 💻 A quiz game in the browser
💡 Efficiency is about how fast the step count grows with the data, not how long the code is
👨👩👧 Notes for parents
Level: Master — roughly Grade 9 / ages 14–15 Duration: 25–35 minutes Format: A quiz game in the browser Concept: Efficiency is about how fast the step count grows with the data, not how long the code is
Learning Objective
Kids compare step counts of search and sort algorithms and justify which one fits a given situation.
Do It Together (Parent-Child Co-participation)
Talk about the real world: why is looking someone up in a sorted phone book faster than digging through an unsorted box of cards? Exactly the same idea.