A lever is a simple machine that turns on a pivot. Exemplar 34 describes how children might begin to develop a simple understanding of levers in the senior classes.

Wheels, axles, belts and chains

Wheel belt systems can be made from thread spools and rubber bands. Children will find that

  • An anti-clockwise movement of one wheel creates a clockwise movement of the other
  • There is a correlation between the number of turns the small wheel makes and the size of the large wheel