A Focus on Fractions is a groundbreaking effort to make the mathematics education research on how students develop their understanding of fraction concepts readily accessible and understandable to pre- and in-service K- 8 mathematics educators. "?Readers will find children's work presented in the book to be interesting and sometimes intriguing. The work provides insights into difficulties understanding fractions and ways to help children develop a better understanding of concepts. Primarily because of extensive samples of student work, this is a valuable book for mathematics educators involved in K-8 classrooms?.Recommended."--CHOICE ? "To watch teachers interact with the research and practical suggestions in this book is exhilarating. The real joy, however, is seeing them use this learned knowledge as they instruct their students. This is a book for all of us who have struggled to help students make sense of fractions."--Mary Montgomery Lindquist, Fuller E. Callaway Professor of Mathematics Education, Emeritus, Past President of the National Council of Teachers of Mathematics ? "This book is a tour de force in relating research and practice in mathematics education, and as such it should also be of great interest to researchers and graduate students in the field."--Edward A. Silver, William A. Brownell Professor of Education, University of Michigan