The area of a parallelogram Whiteboard exercise Play

The area of a regular hexagon Whiteboard exercise Play

The area of a square Animation Play

The area of a trapezium Student activity Play

The area of a trapezium Animation Play

The area of a triangle Student activity Play

The area of a triangle Student activity Play

The area of a triangle Animation Play

The area of an equilateral triangle Student activity Play

The area of the rectangle Whiteboard exercise Play

The area of the rhombus Whiteboard exercise Play

The bonds in the methanal molecule Animation Play

The camera Student activity Play

The camera Whiteboard exercise Play

The circle and the equilateral triangle Whiteboard exercise Play

The circle and the equilateral triangle Student activity Play

The circle inscribed in a square Whiteboard exercise Play

The circle's circumference and its diameter Student activity Play

The counterexample Whiteboard exercise Play

The covalent and ionic bonds Animation Play

The cube root Animation Play

The C–X bond Whiteboard exercise Play

The C–X bond Animation Play

The C–X bond Simulation Play

The C–X bond Whiteboard exercise Play