## Reflection: Grappling with Complexity Telling the story of x - Section 2: New Info/Application

Teaching kids to solve equations has always been a challenge. Some students have much more difficulty than others. It's a good idea to have different strategies "under your sleeve" The cover up technique is one of these. It is also based on working backwards. I tell the student to Cover Up the term with the x in it.

For example:    40x + 10 = 90

"Cover the term 40x with your finger, so the equation looks like"

□ + 10 = 90      Clearly what's in the box is 80

So, 40x = 80      "Think of a division related to this multiplication"

Students will see that x = 2

The cover up method can be used for equations where x appears once, so when students perform these equations, they will have to simplify first.

The Coverup Technique
Grappling with Complexity: The Coverup Technique

# Telling the story of x

Unit 2: Solving Linear Equations
Lesson 2 of 10

## Big Idea: Students learn to solve equations by figuring out what happened to x....in reverse!

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Standards:
Subject(s):
Math, Algebra, Linear and Nonlinear Equations, Solving equations, two, inverse operations, working backwards
55 minutes

### Mauricio Beltre

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