The determination of the empirical formula of ammonia Animation Play

The digits in a four-digit PIN number Whiteboard exercise Play

The distance between the centres of circles Student activity Play

The distribution of the rational numbers over the number line Animation Play

The effect of the centrifugal force Animation Play

The electron spin quantum number Animation Play

The elementary particles Illustration Play

The energy due to nuclear fission Student activity Play

The energy of beta particles Animation Play

The energy of car fuel Student activity Play

The energy of decay Animation Play

The energy required for the extraction Whiteboard exercise Play

The enthalpy of solution Animation Play

The enumeration method Student activity Play

The enumeration method Simulation Play

The equal numbers Whiteboard exercise Play

The equal probabilities Whiteboard exercise Play

The exponential law of decay Illustration Play

The expression for the nth term Class activity Play

The expression for the nth term Whiteboard presentation Play

The factors determining radioactivity Student activity Play

The factors determining radioactivity Simulation Play

The First and the Third Law of Motion Whiteboard presentation Play

The First and the Third Law of Motion Class activity Play

The force of gravity depends on the distance Whiteboard exercise Play