This report provides comparative data on education in developing and developed countries. It presents detailed country-level statistics on inputs such as enrolment rates, teacher to student ratios, and private and public expenditures as a percentage of GDP, as well as outputs such as literacy levels. It outlines some of the general findings and trends evidenced by the data. It discusses the concept of ‘school life expectancy’ (SLE) as a useful comparative measure of years spent in school, changes in participation in various regions over the past decades, comparisons of school year repetition and achievement levels in literacy.