How to determine the heat of vaporisation Whiteboard exercise Play

How to draw a triangle symmetrical to a given point Animation Play

How to find the equation of a tangent from a point to a circle? Animation Play

How to know what transformation was used Animation Play

How to use logarithms? Animation Play

Huygens' Principle Student activity Play

Huygens' Principle Animation Play

Hydrogen bond and dispersion forces Animation Play

Hydrogen bonding Animation Play

Hydrogen bonding and boiling points Animation Play

Hydrogen bonding and boiling points Whiteboard exercise Play

Images in lenses Student activity Play

Images under symmetry in the coordinate system Whiteboard exercise Play

Inscribed circles Whiteboard exercise Play

Inscribed circles, circumscribed polygons Student activity Play

Intercept form of a straight-line equation Student activity Play

Intercept form of a straight-line equation Animation Play

Intersection point Animation Play

Intersection point Animation Play

Intersection point of two straight lines Simulation Play

Intersection point of two straight lines Whiteboard exercise Play

Intersection points (1) Whiteboard presentation Play

Intersection points (1) Class activity Play

Intersection points (2) Whiteboard presentation Play

Intersection points (2) Class activity Play