This is a short, highly accessible book that explains what is known about how people learn math, what causes differences in how children learn math, what math disabilities mean, and how teachers can address the needs of students of all ages and abilities. This book makes recent scientific research about the brain circuitry and thought processes related to mathematics available and accessible to the teachers and psychologists who deal with students' daily frustration. Written from the perspectives of a clinical psychologist and a middle school teacher, this important book discusses normal math cognition, typical math learning difficulties, severe mathematical disability, and the math deficits of students with better-known learning disorders. It features guidelines for assessing math learning problems, and also includes clinical case illustrations as regular examples. Throughout the text there is an emphasis on teaching, featuring many examples from and ideas for the classroom, and the final chapter is fully dedicated to addressing educational implications, incorporating the recent recommendations of the National Math Advisory Panel.