This report describes a program designed to improve science achievement among students in grades 4-6 in a New Hampshire school. The areas of improvement included physical, earth, and life sciences. Analysis of the problem indicated a need for improved teaching techniques and for additional materials related to the instructional strategies. The interventions included inservice experiences to improve the teachers' abilities to use manipulative materials, scientific technique, and concept verbalization. The teachers were introduced to the Investigation Colloquium Method (ICM) of instruction and to the use of new materials purchased for the intervention. Achievement was measured by pretest and posttest assessment which was based on the end-of-chapter and supplemental tests provided in the textbook. The performance objective for all grades was to improve the average pretest score in the three areas of science by 30 percentage points on the posttest. The performance goals were met or exceeded for all areas of science at each grade level. Consistent use of a prescribed instructional strategy and materials by the target group of teachers was seen as a significant factor in student achievement. The appendices contain test materials and science objectives for the units for each grade. (Author/YP)