This book’s first objective is informative: it gives readers new international comparative information about innovation in education compared to other sectors. And it documents change in a variety of dimensions of school practices between 1999 and 2011. Its second objective is methodological: it assesses two approaches to capturing the extent and type of innovation occurring within and across education systems. The third objective is exploratory: this book showcases a large-scale pilot that presents over 200 measures of innovation in education using existing international data.