Research Brief: Effective Pre-School and Primary Education 3-11 (EPPE 3-11) (2003-2008) builds on the work of the earlier Effective Provision of Pre-School Education (EPPE) project (1996-2003) which investigated the impact of pre-school provision on a national sample of young children in England between the ages of 3 and 7 years. EPPE 3-11 is following the same sample of around 2,500 children to age 11, the end of Key Stage 2. This Research Brief focuses on the relationships between various child, family, home, pre-school and primary school characteristics and measures of children's cognitive attainment in Year 5 of primary school (age 10). It compares these findingstotheimpactofthesamefactorswhenthechildrenwereinYear1(age6). Thebriefalsoreports findings about the combined influence of pre-school and primary school experience on children's cognitive attainment in Year 5.