This study concerns the development and preliminary evaluation of a series of "laboratory blocks" of correlated laboratory investigations which integrate traditional subject areas of physical science and introduce key areas of modern science. Concurrent with the development of laboratory blocks have been the design of an inexpensive set of modular instruments and the organization and implementation of a six-week teacher training program co-sponsored by the National Science Foundation and the Atomic Energy Commission. The work also includes a pilot school feedback program and a summer institute follow-up study. Five laboratory blocks were produced as well as enrichment experiments and materials describing the modular instrument kit developed as part of the project. Data gathered during field testing and during the teacher training phases of the program support several generalizations concerning program design and implementation, selection of content, design of supplementary instrumentation for the education laboratory, and classroom utilization of the program. These are reported in the study. (BC)