Divide up your participants into groups
We gave all the participants code numbers. Then we randomly assigned them a colour; red, blue, green, yellow and blue. These numbers and colours became their code name. So after this they were refered to by their code name only. All groups were chosen randomly and contained a mix of boys and girls as well as abilities.
There were 7 pupils in the control group aka red group. These children stayed in their own classroom and played non educational board games with some children from the senior room.
The remaining sixteen pupils were in the test group. These children were divided in to four groups of four for playing games. These were the red, blue, green and yellow groups. These children are the children who played the educational maths games every day for twenty minutes in the senior classroom. Pupils in the senior classroom were assigned to help and tutor each group. The groups and tutors remained the same for the three weeks of the trial.