The union of sets Whiteboard exercise Play

The union of sets Student activity Play

The value of an algebraic expression Student activity Play

The value of an algebraic expression Whiteboard exercise Play

The value of an algebraic fraction Animation Play

The values of the derivative of the sum Whiteboard exercise Play

Theorem – assumptions and claim Student activity Play

Theorem – assumptions and claim Whiteboard exercise Play

Theorems and their assumptions in geometry Student activity Play

Theorems and their assumptions in geometry Whiteboard exercise Play

Transformation of algebraic equations Whiteboard presentation Play

Transformation of algebraic equations Class activity Play

Transformation of algebraic expressions Class activity Play

Transformation of algebraic expressions Whiteboard presentation Play

Transformation of graphs Class activity Play

Transformation of graphs Whiteboard presentation Play

Triangles – part III Student activity Play

Trigonometric functions of the sum and difference of angles (1) Whiteboard presentation Play

Trigonometric functions of the sum and difference of angles (1) Class activity Play

Trigonometric functions of the sum and difference of angles (2) Whiteboard presentation Play

Trigonometric functions of the sum and difference of angles (2) Class activity Play

Two billiard balls collisions and the velocity vectors Whiteboard exercise Play

Using algebraic expressions Student activity Play

Using algebraic expressions Whiteboard exercise Play

Using the sum and difference identities for the sine and cosine Whiteboard exercise Play