The purpose of this study was to investigate the effects of the Physics Curriculum Project developed by the Science Education Center of the University of the Philippines on student achievement. The sample was formed of senior high school students. The subjects were divided into four groups according to the combinations of curriculum materials and trained or untrained teachers. An achievement test was used to collect the data. The analysis of data revealed that students taught by the teachers trained for the curriculum materials achieved significantly higher than students taught by non-trained teachers regardless of curriculum materials. No significant differences in achievement scores were found between students taught the curriculum materials and those not taught the materials. (Author/PS)