##### 7th Grade

### Math Warm-Ups

### Online Resources

The Number System

The Area Model:

Area Model: Multiplication with Whole Numbers

Interactive Simulation - PhET

Interactive Simulation - PhET

Interactive Simulation - PhET

Expressions and Equations:

Interactive Simulation - PhET

Interactive Simulation - PhET

Equality Explorer: Two Variables

Interactive Simulation - PhET

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!**

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

Balancing Scales to Solve Equations

(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