Division into two parts in a given ratio Student activity Play

Division of a segment Animation Play

Domain and periodicity of trigonometric functions Student activity Play

Domain and periodicity of trigonometric functions Whiteboard exercise Play

Double-angle formulas Class activity Play

Double-angle formulas Whiteboard presentation Play

During a thunderstorm Student activity Play

During a thunderstorm Whiteboard exercise Play

Elemental analysis Illustration Play

Empirical formulae and molecular formulae of compounds Student activity Play

Empirical, molecular and general formula Animation Play

Enlargement – the basic property Student activity Play

Enlarging the right-angled triangle – the basic property Simulation Play

Enlarging the square – the basic property Simulation Play

Enzymatic reactions Whiteboard exercise Play

Enzymatic reactions Student activity Play

Equality of two ratios: proportion Whiteboard exercise Play

Equality of two ratios: proportion Whiteboard exercise Play

Equality of two ratios: proportion (1) Student activity Play

Equality of two ratios: proportion (2) Student activity Play

Equations with cos(ax) Whiteboard exercise Play

Equations with sin(ax) Whiteboard exercise Play

Equations with tan(ax) Whiteboard exercise Play

Equations with  cos(ax) Student activity Play

Equations with  sin(ax) Student activity Play