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ADHD Basics

Attention Deficit Hyperactivity Disorder (ADHD) is a condition that becomes apparent in some children in the preschool and early school years. It is hard for these children to control their behavior and/or pay attention. It is estimated that between 3 and 5 percent of children have ADHD, or approximately 2 million children in the United States. This means that in a classroom of 25 to 30 children, it is likely that at least one will have ADHD.*

Click below to learn more about ADHD and what you can do to help children and adults with ADHD achieve their full potential:

*Excerpted from the website of National Institute of Mental Health. Material is included from is a revision of "Attention Deficit Hyperactivity Disorder," a brochure first printed in 1994 and revised 1996. Selected updates from 2006 are added. The revision is by Margaret Strock, staff member in the Public Information and Communications Branch, National Institute of Mental Health (NIMH). Scientific review was provided by Russell A. Barkley, Ph.D., Medical University of South Carolina; Peter A. Jensen, M.D., Columbia University; Edgardo Menvielle, M.D., and Benedetto Vitiello, M.D., staff members, NIMH. Editorial assistance was provided by Lisa Alberts and Constance Burr, Public Information and Communications Branch, NIMH. NIMH Publications are in the public domain. LD OnLine asks that you follow these guidelines from NIMH if you reproduce the material.

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