" Yes, but Why? Teaching for Understanding in Mathematics" by Ed Southall is a manual focusing on education and mathematics, specifically designed to help teachers improve their students' understanding of mathematical concepts. Published by SAGE Publications in 2017, this trade paperback book offers practical strategies and insights for enhancing teaching techniques in mathematics. With 336 pages of valuable content, this book is a valuable resource for educators looking to deepen their students' understanding of mathematical principles. Ed Southall's expertise and dedication to improving mathematical education make this book a must-read for those passionate about student success in the subject.