Reflection: Developing a Conceptual Understanding Mystery Bags Game - Section 1: Opening


I really like how this activity surfaces the idea for students that balance has to be maintained in an equation. Too often I see students manipulating equations or "doing the same thing to each side" without really understanding why. I like the build up here to solving equations by maintaining equality. I think it is a powerful image that can really stick with students and help their conceptual understanding of what an equation is. 

  Developing a conceptual understanding about equations
  Developing a Conceptual Understanding: Developing a conceptual understanding about equations
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Mystery Bags Game

Unit 1: Introduction to Algebra: Focus on Problem Solving
Lesson 9 of 14

Objective: SWBAT solve simple equations and justify their solution method.

Big Idea: How many ounces of gold are in that bag? Students use a pan balance model to solve simple linear equations.

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pan balance
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