The weight of Lena's purchases Animation Play

The weight of the bananas and the apples Animation Play

Transformations of matter and energy Student activity Play

Two-part calculations Student activity Play

Two-part calculations Whiteboard exercise Play

Using the distributive property Animation Play

Vector addition Whiteboard exercise Play

Vector addition Student activity Play

Vector addition Whiteboard exercise Play

Vector addition Student activity Play

Vector addition Whiteboard exercise Play

Vector subtraction Student activity Play

Vehicles Whiteboard exercise Play

Volume changes in gas reactions (1) Student activity Play

Volume changes in gas reactions (1) Whiteboard exercise Play

Volume changes in gas reactions (2) Student activity Play

Volume changes in gas reactions (2) Whiteboard exercise Play

What can you afford in the Internet Café? Student activity Play

What comes next? Animation Play

What comes next? Whiteboard exercise Play

What comes next? Student activity Play

What is the missing number? Student activity Play

Why are they sums? Animation Play

Why some endothermic reactions are spontaneous? Animation Play

Why some exothermic reactions need to be initiated Whiteboard exercise Play