Lena's number Whiteboard exercise Play

Lena's savings Whiteboard exercise Play

Lena's sequence Animation Play

Lena's temperature change Whiteboard exercise Play

Lena's thermometer Whiteboard exercise Play

Lena's way Animation Play

Number patterns Student activity Play

Percentage profit Student activity Play

Population and sample Student activity Play

Purchase price of the bike Whiteboard exercise Play

Reflectors Student activity Play

Surfaces and friction Simulation Play

The bicycle factory Animation Play

The bike trip Animation Play

The weight of Lena's purchases Animation Play

Time needed to travel 360 km Animation Play

Yoko's and Lena's number Whiteboard exercise Play

Yoko's and Lena's savings Student activity Play