Calculating the pH of ammonia/ammonium chloride buffer Animation Play

Calculating the square of a sum Simulation Play

Calculating the square root of a number Whiteboard exercise Play

Cardboard model of a cone Animation Play

Changing metric units of area Whiteboard exercise Play

Changing metric units of area Student activity Play

Changing metric units of area Animation Play

Changing metric units of area into square centimetres Whiteboard exercise Play

Changing metric units of area into square decimetres Whiteboard exercise Play

Changing metric units of area into square millimetres Whiteboard exercise Play

Changing the base Student activity Play

Changing the base Whiteboard exercise Play

Changing the base of logarithm Animation Play

Chemical inertness of alkanes Animation Play

Chemical modification of nitrogenous bases – chemical mutagens Student activity Play

Chemical properties of oxides Student activity Play

Chemical structure of DNA Student activity Play

Choosing an indicator for the titration of a weak acid or a weak base Chart Play

Choosing an indicator for the titration of a weak acid or a weak base Chart Play

Choosing an indicator for the titration of a weak acid or a weak base Student activity Play

Circle inscribed into a parallelogram Simulation Play

Circle inscribed into a square Simulation Play

Circle properties Whiteboard presentation Play

Circle properties Class activity Play

Circular glass pots Animation Play