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The Number System

The Area Model:

Area Model: Multiplication with Whole Numbers

Interactive Simulation - PhET

Area Model: Decimals

Interactive Simulation - PhET

Area Model - Algebra

Interactive Simulation - PhET

Expressions and Equations:

Equality Explorer Basics

Interactive Simulation - PhET

Equality Explorer

Interactive Simulation - PhET

Equality Explorer: Two Variables

Interactive Simulation - PhET

Expression Exchange

Interactive Simulation - PhET

Number Sentence - Equations (Desmos)

The title doesn’t capture what this task is about.  It focuses on matching algebraic expressions to contexts and word descriptions.  It is a worthwhile task.

Equivalent Expressions (Desmos)

Students explore different ways to find the number of tiles in the border of a square swimming pool.  They discover that the expressions they generate are all equivalent. (You would probably need to introduce this during a synchronous lesson and then have students work on it.)

Enter algebraic or numeric expressions and compare. **Cool modeling!**

NCTM Algebra Tiles

Poses problems, has students model with algebra tiles and solve, tells them if they are correct or incorrect.

(PBS Media Learning)

Interactive opportunity to balance a scale.

Inequalities Polygraph (Desmos)

Video Game:  Dragon Box (algebra 12+)

Teaches all the rules for solving algebraic equations but does it visually in a virtual video game environment..

The App is \$7.99

Obstacle Course

Video to Give you Inspiration

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