Providing both the ""how"" and the ""why"" of instruction, this book will provide teachers with the knowledge necessary to teach mathematics to kids from elementary school to high school who have learning difficulties. This book will help readers understand the needs of students with learning difficulties and show them how to provide instruction that makes mathematics accessible, meaningful, and learnable. Students with learning difficulties are described as those with cognitive-based learning problems, such as LD, ADHD, mild MR, and TBI, although the methods should also work with children who second language learners. As an easy-to-read resource, this book provides both the ""how"" and the ""why"" of instruction, giving teachers background on the basics of mathematics and showing them how to implement strategies in their classrooms that will help students with all types of learning difficulties understand mathematical concepts and strategies. The book is divided into four sections. Section one serves as an introduction to the rest of the book, outlining what will be presented, why it is important, and how the information can be used. Section two explains the Big Ideas of mathematics and why mathematics instruction is important for students with learning difficulties.