This document is the 2013 edition of Education at a Glance, an OECD publication that provides key indicators on the state of education internationally. It begins with an editorial and introduction, followed by a reader's guide to the publication. The main body of the document contains eight chapters that summarize education systems and policies across OECD countries using indicators, tables and analyses of trends. Chapter A focuses on educational outcomes and labor market impacts, Chapter B examines financial and human resources invested in education.