"Elementary and Middle School Mathematics: Teaching Developmentally" is a comprehensive textbook authored by John A. Van De Walle. Published by Allyn & Bacon, Incorporated in 2003, this trade paperback is tailored for educators in the field of education, particularly focusing on teaching methods and materials in mathematics. With 544 pages, this English-language publication offers valuable insights and strategies for educators looking to enhance their approach to teaching mathematics at the elementary and middle school levels. It is a valuable resource for those seeking to improve their teaching practices in this subject area.