As a result of Universal Primary Education (UPE) and reform efforts, primary school enrollment in Uganda doubled from 2.9 million in 1995 to 5.8 million by 1998. By 2016, enrollment had reached 8.3 million. Although enrollment gains have been dramatic, the completion rate has stalled for at least a decade, with only about 60% of learners completing primary school. RTI International conducted research that suggests this is due to problems that begin in the first few grades of primary school (and earlier). Primary 1 (P1) repetition is partially attributed to lack of access to early childhood educational opportunities. This brief summarizes these and other key findings of the research, “Repetition of Primary 1 and Pre-Primary Education in Uganda,” published in 2017.