The octet rule Animation Play

The parallelogram rule Student activity Play

The parallelogram rule Whiteboard exercise Play

The parallelogram rule Whiteboard exercise Play

The perimeter of the trapezium Whiteboard exercise Play

The perimeters of a trapezium Whiteboard exercise Play

The pounds and the kilograms Whiteboard exercise Play

The precision of the mid-ordinate rule Chart Play

The reasons for the flow of induced current Animation Play

The rule for the sum of a convergent geometric series Whiteboard exercise Play

The rule for the sum of a convergent geometric series Student activity Play

The rule in the general form Student activity Play

The sequence and its terms Whiteboard exercise Play

The similar terms marked wrong Whiteboard exercise Play

The sine rule Class activity Play

The sine rule Whiteboard presentation Play

The sine rule (the law of sines) Student activity Play

The sine rule and construction of a triangle Animation Play

The surface area of a prism Student activity Play

The surface area of a right prism Whiteboard exercise Play

The transformed point's image Class activity Play

The transformed point's image Whiteboard presentation Play

The trapezium Whiteboard exercise Play

The trapezium Student activity Play

The trapezium rule Animation Play