Reading the formula from the graph Student activity Play

Reading the formula from the graph of a cosine-like function Whiteboard exercise Play

Reading the formula from the graph of a sine-like function Whiteboard exercise Play

Reading the solutions of the inequality from the graph Whiteboard exercise Play

Recover the function Student activity Play

Recover the function using a gradient and a tangent Whiteboard exercise Play

Recover the function using a tangent Whiteboard exercise Play

Reduction formulas due to periodicity Student activity Play

Reduction formulas due to periodicity Whiteboard exercise Play

Reduction formulas for the cosine Animation Play

Reduction formulas for the sine Animation Play

Reduction formulas for trigonometric functions Student activity Play

Reduction formulas for trigonometric functions Whiteboard exercise Play

Representing a quadratic function in vertex form Student activity Play

Representing a quadratic function in vertex form Whiteboard exercise Play

Representing a quadratic function in vertex form by completing the square Student activity Play

Representing a quadratic function in vertex form using the discriminant Student activity Play

Ribosomes – structure and function Slideshow Play

Roots of roots – finding true equations Whiteboard exercise Play

Roots of roots – more examples of true or false equations Whiteboard exercise Play

Rounding decimals Whiteboard exercise Play

Rounding decimals to 0.1 or to 0.01 Animation Play

Rounding decimals to 10–1 or to 10–2 Student activity Play

Rounding large numbers Whiteboard exercise Play

Ruminant stomach – structure and function Animation Play