The principal and azimuthal quantum numbers Animation Play

The Professor's number Animation Play

The quadratic formula Whiteboard presentation Play

The quadratic formula Class activity Play

The raffle Student activity Play

The raffle Whiteboard exercise Play

The ratio of boys to girls Whiteboard exercise Play

The ratio of two numbers Animation Play

The ratio of two values – more difficult problems Student activity Play

The ratios of more than two quantities Student activity Play

The reciprocal of a rational number Animation Play

The reciprocal of a rational number Student activity Play

The reciprocal of a rational number Whiteboard exercise Play

The recurring decimal for the given fraction Whiteboard exercise Play

The relationship between angular velocity and linear velocity Animation Play

The relationship between atomic structure and the position of elements in periods Student activity Play

The relationship between the electronegativity of elements and the chemical properties of their compounds Student activity Play

The relationship between the pressure and the number of gas particles Animation Play

The relationship between voltage and the number of turns in a coil Simulation Play

The relationship between voltage and the number of turns in a coil Whiteboard exercise Play

The relationship between voltage and the number of turns in a coil Student activity Play

The result of a random experiment Whiteboard exercise Play

The result of a random experiment Student activity Play

The result of addition and subtraction of rational numbers Animation Play

The result of division Animation Play