Structure and movement of sperm cells Slideshow Play

Structure of the Roman snail – a typical gastropod Slideshow Play

Supplementary, vertical, corresponding and alternate angles Whiteboard exercise Play

Supplementary, vertical, corresponding and alternate angles Student activity Play

Tactic movements Animation Play

Tectonic movements, earthquakes and volcanoes Class activity Play

Tectonic movements, earthquakes and volcanoes Whiteboard presentation Play

The animal cell Student activity Play

The animal cell Slideshow Play

The apparent movement of the stars Student activity Play

The apparent movement of the stars Simulation Play

The apparent movement of the Sun Student activity Play

The conservation of energy Student activity Play

The direction of the Earth's rotation Whiteboard exercise Play

The Doppler effect Whiteboard exercise Play

The Doppler effect Whiteboard presentation Play

The Doppler effect Class activity Play

The Doppler effect Animation Play

The Doppler effect Student activity Play

The effects of external factors on the rate of transpiration Student activity Play

The energy levels in a solid body Student activity Play

The equation for respiration Whiteboard exercise Play

The equation of a vertical line Animation Play

The force is at some angle to the direction of the movement Animation Play

The functions of cells Student activity Play