How do you find an angle? Student activity Play

How do you find the ratio? Student activity Play

How to estimate the gradient of a curve Animation Play

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

Huygens' Principle Student activity Play

Huygens' principle Whiteboard exercise Play

Identities for trigonometric functions Class activity Play

Identities for trigonometric functions Whiteboard presentation Play

Infinite convergent geometric series Class activity Play

Infinite convergent geometric series Whiteboard presentation Play

Inverse function of the tangent Student activity Play

Inverse trigonometric functions Whiteboard presentation Play

Inverse trigonometric functions Class activity Play

Iron, the most common metal Student activity Play

Iron, the most common metal Whiteboard exercise Play

Justification of the tangent function identity Animation Play

Life cycle of the common liverwort (Marchantia polymorpha) Animation Play

Ligand types Student activity Play

Line that is tangent to both circles Animation Play

Locus Student activity Play

Looking for the formula for a trigonometric function Student activity Play

Looking for the formula for a trigonometric function Simulation Play

Miscellaneous problems Student activity Play

More about the rate of change Student activity Play

More constructions Student activity Play