To learn more about CHADD

-- Children and Adults With Attention Deficit Disorder (CHADD) is an international group providing information and support to parents, adults, teachers and professionals. The organization's Web address is www.chadd.org.

-- National Attention Deficit Disorder Association , a nonprofit organization, prints a newsletter and brochures, holds conferences and maintains a Web site at www.add.org. Dues: $35/year. Write 1788 Second St., Suite 200, Highland Park, IL 60035; call 847-432-5874 or e-mail mailadd.org.

-- Feingold Associations of the U.S. advocates the Feingold program, which asserts that certain food additives aggravate learning and behavior problems. The group publishes a newsletter, a book, a free brochure and lists of products free of the additives considered problematic. For more information, write Box 6550, Alexandria, VA 22306, or call 703-768-3287.