The article traces the history of mass segregation of handicapped students in U.S. public schools, notes the advent of the concepts of mainstreaming and least restrictive environment, and analyzes such ramifications of mainstreaming as increased numbers of handicapped students in college and re-emergence of "tracking" or ability grouping. (CL)

The author reviews results of eight research papers with conflicting data on effectiveness of special versus regular class placement for educable mentally retarded children, expresses need for more research, and emphasizes use of the individualized education plan to determine the most appropriate setting for a child. (MC)

Noted are problems such as the increased incidence of handicaps additional to the hearing impairment, the lack of homogeneity among the hearing impaired, and the poor language ability of most hearing impaired students. Current programs in Missouri, California, and New York are briefly described. (DB)

Most of the principals (82 percent) considered the most effective placement to be a combination of regular class and part-time special education. Only 6.4 percent regarded full-time regular class as most effective, while 10.1 percent favored full-time special class placement. (DB)