The purpose of the INEE Reference Guide on External Education Financing is to enable national decision-makers in low-income countries, including those in fragile situations, to better understand the ways in which donors provide education assistance, how various funding mechanisms work and why donors choose one funding mechanism over another to support education. In addition, it is hoped that this publication will help increase education policy-makers’ awareness of the types of external assistance used to fill gaps in domestic education funding at the field level.