## Reflection: Connection to Prior Knowledge Glancing Collisions - Section 2: ABC Introduction

I've used this strategy most often as a closure to a lesson, but I thought I'd try it today as an introduction. The purpose was to refresh students' memories about things discussed during the previous class period. I was quite impressed with how it turned out, since my students made meaningful contributions. Many of the contributions I was able to build upon during other parts of the lesson, so it was a nice way to start the class. I'd definitely use the ABC Summary strategy as an intro activity again!

It does cross my mind that this activity is a bit juvenile for students at the AP Physics 1 level. However, I believe the opportunities to make connections to previously learned material (either from a current or past lesson) and to develop physics vocabulary are invaluable. Students often have fun during this activity and it doesn't take much time, so I'll continue to implement it in my classroom.

ABC's as an Intro or Closure!
Connection to Prior Knowledge: ABC's as an Intro or Closure!

# Glancing Collisions

Unit 5: Linear Momentum
Lesson 6 of 9

## Big Idea: The vector nature of momentum helps students realize that the law of conservation of momentum applies to glancing collisions, too!

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Standards:
50 minutes

### Sara Leins

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