The purpose of this lesson is to encourage pupils to engage in systematic and exhaustive working. Unless proper emphasis is placed on planning the colouring and the systematic nature of the process, the lesson will be wasted. It is not necessary to use the worksheet provided - you may find it easier to lead from the board organising their thinking and asking the questions orally. For some able year seven pupils and many year eight pupils the colouring part of this task may be trivial and Traffic Lights may present a more suitable challenge. Even with these pupils, however, describing how to make predictions for the number of eggs required in similar contexts may present a challenge.
Possible approaches Tell the story of the Easter Bunny.
Show an OHP of an Easter egg and invite pupils up to colour in a section in the colour of their choice. Ask how many different things in your diagram could be changed. Ask for two minutes silence while everyone thinks of a plan. Allow a further three or four minutes for groups of two or three pupils to explain their ideas and decide on a group plan. Brainstorm group ideas.