The quadratic equations Animation Play

The quickest method Animation Play

The solution of the equation Whiteboard exercise Play

The solution of the equation 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 unknowns Whiteboard exercise Play

Think of a number Whiteboard exercise Play

Think of a number Student activity Play

Using linear equations to solve practical problems Student activity Play

Using new variables to solve trigonometric equations Whiteboard exercise Play

Using systems of inequalities to solve quadratic equations with a parameter Student activity Play

Using the calculator to solve trigonometric equations Animation Play

Using the discriminant to solve a quadratic equation Whiteboard exercise Play

Writing and solving the equation Student activity Play

Yoko's and Lena's number Whiteboard exercise Play

Yoko's number Whiteboard exercise Play