## Reflection: Checks for Understanding Flying on a Number Line - Section 5: Closing

As I corrected the exit slips, I found that most students were able to successfully add and subtract multi-digit numbers and model their thinking on the number lines. Here's an example of a Proficient.jpg student.

A few students struggled with using the number line model. For example, this student, Nearing Proficient.jpg, was able to add and subtract using the algorithm, but struggled with taking one jump at a time on the number line. I'll make sure to conference with him in the next few days to make sure he doesn't just understand the steps in a process (algorithm), but that he understands how to model the process using visual aids, such as number lines.

Checks for Understanding: Reflection

# Flying on a Number Line

Unit 5: Adding & Subtracting Large Numbers
Lesson 7 of 16

## Big Idea: Students will decompose numbers and take jumps on the number line to model problems involving flight distances.

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90 minutes

### Kara Nelson

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