The category of attention deficit disorder is defined in terms of diagnostic symptoms (inattention, impulsivity, and hyperactivity) and definitions. Aspects which need to be covered in the classroom evaluation of a child with suspected attention deficit disorder are reviewed, including examination of the task for its appropriateness; determination of a specific learning disability in the child; observation of the setting (including the classroom order, acceptance, and the teaching style); and finally, consideration of the child (existence of emotional stress, neurological problems, and mild hearing loss). (Case histories are presented to illustrate assessment considerations.) (CL)