Workbook on Mental Addition and Subtraction. New!!

Dr. Benjamin recently teamed up with middle school math teacher and artist Natalya St. Clair to produce The Art of Mental Calculation, a workbook designed to teach elementary school students (and beyond) how to do mental addition and subtraction. This workbook provides over 300 examples and exercises. Through clever writing style, amusing illustrations, and engaging dialogue, the book makes math fun and accessible to everyone. To purchase your copy (for under $15), visit here.