A line passing through two points Simulation Play

A linear function  y = ax + b Student activity Play

A perpendicular through a point off the line Student activity Play

A perpendicular through a point off the line Simulation Play

A perpendicular through a point on the line Simulation Play

A perpendicular through a point on the line Student activity Play

A point of tangency Whiteboard exercise Play

A proof for rapid exchange of hydrogen atoms in hydroxyl groups Slideshow Play

A space colony – factorisation makes calculations easier Student activity Play

A square and a straight line Student activity Play

A square and a straight line Simulation Play

A straight angle Whiteboard exercise Play

A straight line Animation Play

A symmetrical triangle on non-squared paper Student activity Play

A symmetrical triangle on squared paper Student activity Play

A symmetrical triangle on squared paper Whiteboard exercise Play

A triangle symmetrical with respect to a line Whiteboard exercise Play

A triangle symmetrical with respect to a line Student activity Play

A vector equation of a line passing through two points – justification Animation Play

Absorption spectra Student activity Play

Absorption spectrum of Co(II) ions Illustration Play

Absorption spectrum of Co(II) ions Whiteboard exercise Play

Absorption spectrum of gases Whiteboard exercise Play

Absorption spectrum of gases Student activity Play

Absorption spectrum of gases Animation Play