Reading the rounded value of the square root Animation Play

Reciprocal of a number Whiteboard exercise Play

Reciprocal of irrational numbers Whiteboard exercise Play

Recommended number of stems Whiteboard exercise Play

Rectangle built up of 60 equal squares Animation Play

Rectangles Student activity Play

Rectangles in LOGO Student activity Play

Reflection symmetry in the coordinate system in the x-axis and the y-axis Student activity Play

Regular and irregular polygons Student activity Play

Regular polygons Animation Play

Regular polygons Simulation Play

Regular polygons Animation Play

Regular polygons – the octagon Student activity Play

Regular polygons – the square Student activity Play

Regular polygons – the square Simulation Play

Regular polyhedron Animation Play

Regular shapes Student activity Play

Relationship between the group number and the number of valence electrons Animation Play

Relative atomic mass Whiteboard presentation Play

Relative atomic mass Class activity Play

Relatively prime numbers Whiteboard exercise Play

Reliability of demonstration Animation Play

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

Reversing the percentage change Student activity Play

Rhombuses and squares Student activity Play