Examines whether controlled choice is a superior desegregation tool for urban schools. A study of 20 school districts with minority populations above 30% revealed controlled choice to be as unpopular as mandatory reassignments, to produce greater white flight than magnet-voluntary plans, and to offer less interracial exposure than do voluntary…

Discussion of collaborative hypermedia instruction focuses on a study that compared the achievement of eighth-grade students working individually or in pairs on a hypermedia-based unit on computer ethics. Group composition (i.e., homogeneous versus heterogeneous pairs) and the impact of social context are investigated. (Contains 41 references.)…