The speed equation triangle Student activity Play

The speed equation triangle Animation Play

The speed equation triangle Illustration Play

The speed of runners Animation Play

The standard and the general form of the equation of a straight line Animation Play

The standard equation of the straight line Animation Play

The standard form of the equation of a straight line Student activity Play

The standard form of the equation of a straight line Whiteboard exercise Play

The state equation Animation Play

The Superb Sandwich Company Animation Play

The test-point method Student activity Play

The unknown on both sides of the equation Student activity Play

The unknown on both sides of the equation Whiteboard exercise Play

The unknown on one side of the equation Whiteboard exercise Play

The unknown on one side of the equation Student activity Play

The unknown on one side of the equation – more difficult problems Student activity Play

The unknowns Whiteboard exercise Play

The value of the number m Whiteboard exercise Play

The vector equation of a line Animation Play

The weight of one lemon Animation Play

The x- and y-intercepts of a linear function Student activity Play

Theorems and their assumptions in algebra Student activity Play

Theorems and their assumptions in algebra Whiteboard exercise Play

Theorems and their assumptions in geometry Student activity Play

Thermal effects of changes in gas density Whiteboard exercise Play