Lesson 2 — A Two-Step Machine

Age: Grades 4–6 (ages 9–12) Duration: 20 minutes Format: Web game (play right away, no prep needed) Concept: Functions — a function can have several steps chained together, and doing them in the right order matters for getting the right answer.

Learning Objective

Kids calculate the output of a machine with a 2-step rule — understanding that the order of steps in a function affects the answer.

Do It Together (Parent-Child Co-participation)

Try swapping the order of the two steps (like +3 first, then ×2) and ask your child if the result is the same — and why.