The Cambridge Conference on School Mathematics (CCSM) was an association of prominent mathematicians who had a concern for mathematics education at school level, from kindergarten through grade twelve. These mathematicians organized three main conferences in three areas of mathematics education, and have carried on activities related to the findings of the conferences. The main activity in the area of school education was the Cambridge Conference on School Mathematics held in Cambridge, Massachusetts in 1963. Subsequent activity arising from the original conference led to workshops and a series of feasibility studies. The main activity in the area of teacher education was a conference in 1966. Subsequent activity arising from this conference included some in-service teacher training work in Lexington and Newton, Massachusetts and in Princeton, New Jersey. Pre-service preparation work took place at the University of California, Berkeley; Indiana University; Teachers College, Columbia University; Boston State College and other state colleges in Massachusetts. A third conference was held in 1967 to consider the integration of primary school mathematics and science. The main activity arising from this conference was classroom trials of ideas. The outcome of these trials was a new program entitled Unified Science and Mathematics for Elementary Schools (USMES). This report details activities in the three areas of concern, and includes eleven appendices of relevant materials. (Author/MK)