UNESCO has revised its Sexuality Education and Review Assessment tool (SERAT) to reflect the revised version of the UN International Technical Guidance on Sexuality Education. SERAT is an excel-based tool, designed to help countries collect data and analyze the strengths and gaps in their [HIV prevention and] sexuality education programmes at primary and secondary school levels. Its purpose is: To review school-based HIV prevention and sexuality education programmes based on international evidence and good practice; To provide data to inform improvement or reform of programmes; To assess programme effectiveness by focusing on health data and other social criteria (notably gender) when looking at its strengths and weaknesses; To inform debate and advocacy by making available data on sexuality education that is understandable, easy to analyse and accessible to different audiences.