Over the past 20 years, major theoretical, methodological, and instructional advances have altered the landscape of learning disability research and practice. Bringing the field thoroughly up to date, the Handbook of Learning Disabilities provides an authoritative review of what is known and what still remains to be discovered in this rapidly evolving area. Leading investigators discuss their own and others' influential research, synthesizing a vast body of knowledge on the nature of learning disabilities, their causes, and how students with these difficulties can be identified and helped to succeed. A unique contribution to the contemporary literature, this is an indispensable reference for scholars, students, and practitioners.