A circle and a line Student activity Play

A circle and quadrants of the coordinate system Whiteboard exercise Play

A circle circumscribed about a regular pentagon Whiteboard exercise Play

A circle circumscribed about a triangle Whiteboard exercise Play

A circle circumscribed about a triangle Student activity Play

A circle inscribed in a triangle Student activity Play

A circle with centre at the origin Animation Play

A clock in a rocket Whiteboard exercise Play

A clock in a rocket Student activity Play

A closed curve Student activity Play

A closed curve Whiteboard exercise Play

A coin-tossing simulator Simulation Play

A commutator Animation Play

A commutator Whiteboard exercise Play

A commutator Student activity Play

A comparison of the properties of C–C bonds and C=C bonds Animation Play

A compound containing a long hydrocarbon chain with the CCl3 group Animation Play

A compound containing polar hydroxyl groups along the hydrocarbon chain Animation Play

A cone Animation Play

A couple Animation Play

A couple Whiteboard exercise Play

A couple Student activity Play

A covalent bond in a hydrogen molecule Animation Play

A cross-section of a cap fungus Illustration Play

A crown of gold mixed with silver Animation Play