## Reflection: Intervention and Extension Expanded Form - Section 4: Closing

As students were working on the final task, I found this student had difficulty changing larger numbers from expanded form to standard form. Often, he would end up with too many digits. To help him be successful, I showed him how to Add up Vertically! instead of horizontally.

On the next problem, I tried another way of supporting him. I grabbed the place value flip chart and modeled how to use the expanded form given in standard form on the chart. Here, he is Using the Place Value Chart and it turns out to be quite helpful.

Intervention and Extension: Reflection

# Expanded Form

Unit 4: Place Value
Lesson 5 of 8

## Big Idea: Being able to understand and explain numbers will help students make sense of multi-digit computation and problem solving.

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110 minutes

### Kara Nelson

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