Closing the achievement gaps that separate the academic performance of various subgroups of students is a central goal of current education reform efforts nationwide. Hard-earned progress has been made at the elementary school level, but high school students are not progressing nearly as well. Indeed, it is at this level that performance gains in general have been most elusive and chronic student achievement disparities among significant subgroups seem most intransigent. Yet success is not beyond reach. This guide profiles eight charter secondary schools that are making headway in meeting the achievement challenge. They are introduced here so their practices can inspire and inform other school communities striving to ensure that all of their students, regardless of their race, ZIP code, learning differences, or home language, are successful learners capable of meeting high academic standards. This book is one of a series of innovation guides produced by the U.S. Department of Education. These guides will feature K-8 schools that are closing the achievement gap and highlight promising practices to expand the pool of high-quality charter schools. In addition, the series will include strategies to encourage parents to help improve schools and show ways in which distance learning can increase access to rigorous course work.