Unlike other books in the field, the focus of this comprehensive book is on explanatory theories of learning disabilities and the assessment and instructional/treatment programs generated within each theoretical model.By examining how theories and practices emerged in the past, the book helps readers/students understand the developmental link to the assessment and instructional practices they will use as teachers. With its broad overview of the field, this book will give current and future teachers the ability to answer the question of "why" they have chosen a particular way of arranging instruction.