This chapter gives brief description of the case study that used learning games for mathematics through mobile technologies. The Kisumu randomized controlled trial (RCT) aimed to evaluate the contribution of different mobile technologies to enhance pupil reading acquisition within a larger education reform effort, the Primary Math and Reading (PRIMR) Initiative, funded by the United States Agency of International Development (USAID) implemented by RTI International. The specific mobile interventions trialed in Kisumu were: the use of tablets to bolster the Teachers' Advisory Centre (TAC) Tutor instructional support system; the use of teacher tablets with classroom pedagogical support, specifically Tangerine: Class; and the use of e-readers to help pupils practice reading. The RCT carefully analyzed the cost of each intervention as a consideration for sustainability and replication. Pupils in all three treatment groups scored significantly higher statistically on key outcomes compared to pupils in the control group, but the teacher tablet group yielded the highest effect sizes.