How do we calculate x? Animation Play

How do you find an angle? Student activity Play

How does it work? Animation Play

How many were there? Whiteboard exercise Play

How many were there? Student activity Play

How many were there? A more difficult problem Student activity Play

How many? A more difficult problem Student activity Play

How much does an apple weight? Whiteboard exercise Play

How much does it cost? Student activity Play

How much does it cost? Whiteboard exercise Play

How much does it weigh? Animation Play

How much does it weigh? Student activity Play

How much does it weigh? Simulation Play

How much does it weigh? How much does it cost? Student activity Play

How much does the notebook cost? Whiteboard exercise Play

How much does the stamp cost? Simulation Play

How much does the ticket cost? Whiteboard exercise Play

How to plot one graph given another Whiteboard exercise Play

How to plot one graph given another Student activity Play

Inverse function Class activity Play

Inverse function Whiteboard presentation Play

Inverse operations Student activity Play

Inverse operations Whiteboard exercise Play

Large numbers Student activity Play

Lena's number Whiteboard exercise Play