CHADD is the leading resource on Attention-Deficit/Hyperactivity Disorder (ADHD), providing support, training, education and advocacy for the 17 million children and adults in the United States living with ADHD, their families, educators, and healthcare professionals. As home to the National Resource Center on ADHD, funded by the U.S. Centers for Disease Control and Prevention, CHADD is the most trusted source of reliable, science-based information regarding current medical research and ADHD management, and offers comprehensive programs and services at both the national and local levels.