Data collected nationwide from 1968 to the 1980-81 school year form the basis of this report on changes in school racial composition in States, Metropolitan areas, and large cities. Trends in the percentages of Black, Hispanic, and White students are discussed by region. It is indicated that the greatest gains in desegregation of blacks have taken place in the South, probably due to the relatively strong enforcement of civil rights policies in this region. Another major trend discussed is that of increasing segregation of Hispanic children in all parts of the country. Based on the analysis of data from metropolitan areas and cities, it is suggested that the key to reducing segregation has been the implementation of desegregation plans on a metropolitan or city wide basis in the districts that still retain white majorities. (Author/GC)