This directory lists 127 School System Projects for 1975-76 assisted by grants from the National Science Foundation. These projects are directed at bringing about specified curriculum or course changes or improvements in designated classrooms through the direct cooperation of colleges and universities and school systems. Thumbnail descriptions of individual projects are given. Projects concerned primarily with secondary school curricula are grouped in the first section; those devoted primarily to elementary school curricula are listed in the last section; those treating both are catalogued in the intervening section. (Author/EB)