Congruent figures – solving problems Student activity Play

Congruent triangles – solving problems Student activity Play

Construction of a system of linear equations Student activity Play

Denoting the content of a problem in the form of algebraic expressions Whiteboard exercise Play

Diamonds Whiteboard exercise Play

Distance – a more difficult problem Whiteboard exercise Play

Distance – a more difficult problem Student activity Play

Emmanuel's and Lena's number Whiteboard exercise Play

Emmanuel's number Animation Play

Equation with two unknowns Whiteboard exercise Play

Equations with brackets Whiteboard exercise Play

Equations with brackets Whiteboard exercise Play

Equations with brackets Student activity Play

Equations with two unknowns Student activity Play

Example of solving a rational equation Animation Play

Example of solving a system of linear equations by elimination Animation Play

Example of solving a system of linear equations by substitution Animation Play

Example of solving a trigonometric equation Animation Play

Example of solving linear inequality with the parameter Animation Play

Examples of quadratic equations Whiteboard exercise Play

Examples of quadratic equations Student activity Play

Famous problems Student activity Play

Flowers problem Animation Play

Forest density and bird density problem – conclusions Animation Play

Forming and solving linear equations Animation Play