Northern California's Chapter of CHADD, the International Organization Working to Improve the Lives of People with Attention-Deficit/Hyperactivity Disorder (ADHD) Through Education, Advocacy, and Support.

LD OnLine is the leading website on learning disabilities, learning disorders and differences. Parents and teachers of learning disabled children will find authoritative guidance on attention deficit disorder, ADD, ADHD, dyslexia, dysgraphia, dyscalculia, dysnomia, reading difficulties, speech and related disorders. LD OnLine works in association with Learning Disabilities Association of America, International Dyslexia Association, Council for Exceptional Children, Schwab Foundation for Learning, and the Coordinated Campaign for Learning Disabilities.

This is the National Resource Center on ADHD, funded by CDC, with science-based information about ADHD and ADD.