What this lesson teaches
Linear equations in one variable.
Math in Action
Algebra Balance Scale
Use a balance scale to solve linear equations!
Duration30 min
Age GroupAges 11–14
DifficultyIntermediate
SubjectMath
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The learning connection
The balance metaphor for equations is cognitively elegant because it makes the core rule (whatever you do to one side, do to the other) physically obvious. Students who learn algebra through balance models retain the concept of equivalence in ways that symbol manipulation alone does not build.
Try it with your learner
1. Draw balance. 2. Put x+3 on left. 3. Put 7 on right. 4. Remove 3 from both sides. 5. Find x.