Results are provided from a longitudinal study of 16 local education agencies (LEAs) implementing P.L. 94-142 (the Education for All Handicapped Children Act) over the past four school years. Findings are based primarily on interviews with LEA personnel and community professionals. Results are presented according to the following general topics (sample subtopics in parentheses); (1) procedures and training (child find activities, prereferral screening and intervention activities, parent notice and consent procedures, multidisciplinary evaluation and reevaluation, least restrictive environment, and procedures related to individualized education programs); (2) scope and comprehensiveness of special education and related services (changes in range of handicapping conditions served, and changes related to least restrictive environment provision); (3) sequence of implementation of P.L. 94-142 (procedural changes and variation in the sequence of implementing P.L. 94-142); (4) the overall effects of P.L. 94-142 (on local personnel, parents, and children); and (5) consideration of the factors affecting P.L. 94-142 implementation (including federal and state mandates and court cases). It is concluded that services have improved and that special education at the local level has increased in scope and comprehensiveness, but that lack of resources have hindered the full realization of P.L. 94-142. (CL)