Ten hypotheses were tested to evaluate the effects on pupils and teachers of open space construction. Over 2,000 students in open and traditional schools were selected for experimental and "control" groups. Grades 4 and 7 pupils were selected specifically since major data indicative of academic achievement were drawn from the County Testing Program that was administered to all grades 4 and 7 students. In addition to these tests, questionnaires were sent to teachers and principals of schools involved in the study and to about 500 parents. Study findings indicate in part that there are no significant differences in achievement between students in open plan and traditional design schools, and that students from traditional design schools express significantly more positive attitudes about the nonphysical and physical aspects of their learning environment than do students in open plan schools. (Appendixes may reproduce poorly.) (MLF)