Half-reactions Animation Play

How does a fuel cell work? Animation Play

How many are there? Student activity Play

How many more? Student activity Play

How many seats there are? Whiteboard exercise Play

How much did it cost before? Student activity Play

How much do we have to pay? Student activity Play

How much does it cost now? Student activity Play

How much does it cost? Student activity Play

How much does it cost? Whiteboard exercise Play

How much does it cost? Student activity 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

Identical data, different qualities Student activity Play

Identifying oxidation–reduction reactions Student activity Play

Identifying oxidation–reduction reactions Whiteboard exercise Play

Imperial units of area Student activity Play

Inflation Whiteboard exercise Play

Inflation Student activity Play

Iron extraction Student activity Play

Isolating very reactive metals Animation Play

Lenna's shopping Whiteboard exercise Play

Low-energy house Student activity Play