## Reflection: Developing a Conceptual Understanding How do I solve a change unknown word problem? - Section 2: Introduction to New Material

Many students struggle with story problems because they can't visualize what is happening in the problem.  When introducing new kinds of story problems, I oftentimes ask students to model the problem using manipulatives or a picture to represent the problem.  When students represent the problem with manipulatives or a drawing, they can more effectively visualize what is happening the problem and can use the model to help them build a relevant number sentence.

Drawing Pictures to Explain a Story Problem
Developing a Conceptual Understanding: Drawing Pictures to Explain a Story Problem

# How do I solve a change unknown word problem?

Unit 6: Three-Digit Addition and Subtraction
Lesson 9 of 13

## Big Idea: This lessons starts with a concrete representation of a change unknown problem and then pushes students to think abstractly and develop number sentences to solve change unknown word problems.

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Standards:
Subject(s):
Math, Differentiation, Number Sense and Operations, addition, subtraction, Word Problem
50 minutes

### Caitlin Vaughan

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