The Education Sector Support Programme in Nigeria (ESSPIN) (2008–17) seeks to improve learning outcomes for children of basic education age in six Nigerian states: Enugu, Jigawa, Kaduna, Kano, Kwara and Lagos. The aims of the ESSPIN Composite Surveys are to assess the effects of ESSPIN’s integrated School Improvement Programme (SIP), and to report on the quality of education in public schools in the six ESSPIN-supported states. ESSPIN is funded by the UK Department for International Development (DFID) and managed by a consortium led by Cambridge Education. The Composite Surveys have been carried out for ESSPIN by Oxford Policy Management (OPM). This report presents findings from the first, second and third rounds of the Composite Survey (CS1, CS2 and CS3), conducted in 2012, 2014 and 2016, respectively. The survey covered a wide range of indicators at the teacher, head teacher, School-Based Management Committee (SBMC), and pupil levels. This report attempts to understand how inclusive practices in schools and SBMCs in Education Sector Support in Nigeria (ESSPIN) states are changing over time and whether schools which receive ESSPIN’s interventions are working better than those which do not (Part A); and whether there are differences in education outcomes by gender and background (Part B).