## Checking Their Work - Section 2: Teaching the Lesson

Checking Their Work

# Using Models to Add and Subtract

Unit 17: Getting Better at Addition and Subtraction
Lesson 4 of 12

## Big Idea: Common Core standards encourage the use of models to build understanding in math. This lesson shows sometimes reluctant 2nd graders that models are helpful tools in solving mathematical problems.

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Standards:
Subject(s):
Math, modeling, Number Sense and Operations, addition, manipulatives, Operations
40 minutes

### Beth McKenna

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