The Great Starts Mathematics Approach, the early childhood component of the Staff Development Program in Mathematics, Science, and Computer Science, is a collaborative 3-year staff development project. The project's goal is to develop a model for improving mathematics instruction in kindergarten through second grade. This is the evaluation report of the implementation of the program during the project's second year. School principals, teachers, and paraprofessionals from two schools attended monthly mathematics workshops held after school. Training activities focused on teaching mathematical relationships and concepts through directed play and exploration with concrete materials. Although student achievement as measured by the scores on the second-grade mathematics test did not show improvement, correlational analyses indicate some relationship between teaching techniques as observed in the classrooms and test scores. Children whose teachers used more product-oriented teaching techniques tended to have lower scores on the mathematics test than children whose teachers used process-oriented techniques. Chapters included are: (1) "Introduction"; (2) "In-Service Professional Development and Staffing"; (3) "Classroom Implementation"; (4) "Student Achievement"; and (5) "Conclusions and Recommendations." Descriptions of classroom activities and teaching techniques used by field staff in the classroom are appended. Twelve references are listed. (YP)