## Reflection: Modeling Tell Me A 2 by 1 Digit Multiplication Story (Lesson 1 of 2) - Section 1: Warm-Up

I realized that many students were using the traditional algorithm and I should have pushed further here to have another student come up and show me an array or groups to match his work. We just learned the traditional algorithm after a lot of work in modeling groups, and I would have liked to have made that connection here.

This is a critical connection and I urge you to hold students accountable for connecting the standard algorithm to the models. Because math is cumulative, it is important to identify gaps as early as possible.  Otherwise it is possible some students will move ahead without a foundational understanding and later, when the understanding of multiplication becomes critical they will be unprepared.

Observation
Modeling: Observation

# Tell Me A 2 by 1 Digit Multiplication Story (Lesson 1 of 2)

Unit 8: 2-Digit by 1-Digit Multiplication
Lesson 2 of 3

## Big Idea: Students use two numbers to create a multiplication word problem, demonstrating the solution using a visual model matching their strategy choice (equal groups, arrays or repeated addition).

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55 minutes

### Sarah Maffei

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