The Individual Mathematics Teaching Project (IMU) has been under development in the upper level (grades 7-9) of the comprehensive school in Sweden since 1964. Its goals are (1) to construct and test self-instruction study material in mathematics, (2) to find suitable teaching methods and work forms for the use of this material, (3) to try out different ways of grouping pupils and making use of teachers in order to achieve maximal effect for the material and methods, and (4) to measure the effects of the individualized teaching (in comparison with conventional teaching). There have been three major revisions of this program resulting from extensive field testing. The present report gives a brief background of the project and results of investigations carried out during the 1968/69 and 1969/70 school years. (JP)