A research study on the effects of using a computer console had on children's mental computation skills and self-perceptions was carried out by Miller and Robertson in 2009 and again on a larger scale in 2010. The study compared two groups - the experimental group, who used DS consoles to practice mental maths, and the control group who used traditional methods of practicing mental maths. Their findings highlight an increase in terms of faster processing of information, the enhanced selection of relevant material and high levels of engagement. However, they also accept there is limited evidence to suggest that pupils' learn new skills through GBL.It was found that the mean gain in the experimental group was approximately 50% greater than that of the control group in terms of accuracy in calculation. In terms of the speed of processing, significant improvements were recognized in both groups. However, the mean improvement in the experimental group was more than twice that of the control group.The analysis of these results highlighted that in terms of accuracy, the less able children improved more than the higher ability children (See appendix 1) and the middle-ability children tended to improve their time more than the children at the top and bottom of the ability range. (See appendix 2). The study also found that there was a much stronger intrinsic motivational drive amongst pupils for self- improvement.