Cubes – perpendicular faces and nets Student activity Play

Cuboids and their nets Whiteboard exercise Play

Cuboids and their nets Student activity Play

Cuboids – parallel edges and perpendicular edges Student activity Play

Cuboids – parallel faces and nets Student activity Play

Cuboids – perpendicular faces and nets Student activity Play

Cutting a pyramid Animation Play

Depletion of the ozone layer Slideshow Play

Derivation of the formula Animation Play

Do plants receive information? Student activity Play

Doppler effect Whiteboard presentation Play

Doppler effect Class activity Play

Doppler effect for different waves Whiteboard exercise Play

Doppler effect for different waves Student activity Play

Economics of the extraction of metals Student activity Play

Effect of a change in reactant concentration on the rate of a chemical reaction Animation Play

Effect of concentration increase on reaction rate at the molecular level Animation Play

Effect of concentration on chemical equilibrium Simulation Play

Effect of concentration on chemical equilibrium Student activity Play

Effect of concentration on reaction equilibrium Whiteboard exercise Play

Effect of concentration on reaction equilibrium Student activity Play

Effect of concentration on the rate of chemical reactions Simulation Play

Effect of concentration on the rate of chemical reactions Student activity Play

Effect of concentration on the reaction rate. Graphical methods Whiteboard presentation Play

Effect of concentration on the reaction rate. Graphical methods Class activity Play