Selective research studies were examined to determine the competencies necessary for successfully mainstreaming handicapped students. An understanding was sought of: (1) the problems associated with competency development for mainstreaming situations; (2) the areas of training for both regular and special education personnel; and (3) the interrelationships among competencies in regular and special education. Competencies in specific abilities, skills, and techniques are identified. Administrator responsibilities are discussed with particular emphasis on dealing with teacher burnout resulting from the stresses that accompany mainstreaming situations. Suggestions are made for curricular reform in schools of education that will prepare special and regular teachers for mainstreaming and also for the development of significant inservice programs. (JD)