Segment divided into 36 equal parts Whiteboard exercise Play

Simple quadratic equations Student activity Play

Simplifying algebraic expressions Student activity Play

Solving problems Student activity Play

The area of a triangle Animation Play

The equal expressions Whiteboard exercise Play

The equal numbers Whiteboard exercise Play

The equal probabilities Whiteboard exercise Play

The expressions of equal value Whiteboard exercise Play

Vectors Class activity Play

Vectors Whiteboard presentation Play

Volume of a figure with equal cross sections Student activity Play

Volume of a figure with equal cross sections Animation Play

What is an equation? Student activity Play

When is work equal to zero? Animation Play

When some coefficients equal zero Animation Play

Why two acids or bases of equal concentrations may have different pHs Student activity Play

Wrong steps in reasoning Student activity Play