Expressions and Equations

Reason about and solve one-variable equations and inequalities.

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Resource | Resource Type Grade Level | Rating |
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This Sketchpad activity, which opens on Geometer's Sketchpad as well as on iOS with Sketchbook Explorer (cataloged separately), allows students to use a scale to develop early algebraic concepts of the equal sign and variables. Learners determine different ways to place shapes with assigned numerical values on one side of a scale to balance with given shapes on the other side. A five-minute movie provides detailed instructions and downloadable PDF of teacher notes and student worksheets are also included. | Activity, Lesson Plans, Video Grade Level: 4, 5, 6+ | |

This Sketchpad activity, which opens on Geometer's Sketchpad as well as on iOS with Sketchbook Explorer (cataloged separately), is the third of three balance activities in which students develop intuitive strategies for writing and solving algebraic equations. In this final activity, users must simplify algebraic equations by removing identical shapes from both sides of a scale. A five-minute movie provides detailed instructions and downloadable PDF of teacher notes and student worksheets are also included. | Activity, Lesson Plans, Video Grade Level: 5, 6+ | |

This animated PowerPoint lesson demonstrates how to substitute the value of a variable in place of the variable's symbol in an algebraic expression, and presents the concept of solving an equation for an unknown variable value. | Demonstration Grade Level: 5, 6+ |