Book excerpt: Annotation. As the education reform movement matures into its second decade, it is clear that many promising efforts have fallen short in their attempts to create real school change. One reason for this is that the process of school reform is much more complex than most reformers realized or were willing to acknowledge. The Dimensions of Time and the Challenge of School Reform points to another problem--the problem of time--and its role in both the success and failure of school reform efforts. The importance of understanding the role that time plays in both learning and instruction and finding ways to provide time for teachers grappling with change and students learning to accommodate a new language and culture are important themes in this book. This book is directed to policymakers and practitioners as well as to academics in that it combines theory with the "real world" experiences of many who have been active in the school reform movement and who have learned, through trial and error, how to think about time in innovative ways. Book jacket.