Reliability of demonstration Animation Play

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

Rhombuses and squares Student activity Play

Roots of roots – finding true equations Whiteboard exercise Play

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

Rotation symmetry Animation Play

Rotations Student activity Play

Rotations Whiteboard exercise Play

'Rounded' Pythagorean theorem Animation Play

Ruler-and-compass constructions, locus (2) Whiteboard presentation Play

Ruler-and-compass constructions, locus (2) Class activity Play

Rules of multiplication and irrational numbers Animation Play

Scale factor Student activity Play

Sections of a cube Student activity Play

Sections of a cube Whiteboard exercise Play

Shapes that have rotation symmetry Student activity Play

Sierpinski's Carpet Whiteboard exercise Play

Sierpinski's Carpet Student activity Play

Sierpinski's Carpet Animation Play

Sierpinski's Carpet – activity Whiteboard exercise Play

Similar prisms and pyramids Student activity Play

Simple examples of index laws Whiteboard presentation Play

Simple examples of index laws Class activity Play

Simplification of square roots Animation Play

Simplifying the squares of the sums Whiteboard exercise Play