The Biological Sciences Curriculum Study (BSCS), with support from the National Science Foundation, is conducting a three-year project to develop a model for implementing educational computing in school science. This paper explains the tentative model in detail and presents the results of a pilot test of the model, which project staff conducted during the first year of the project. The goals for the project are: (1) to develop and test a model of implementing educational computing in school science; (2) to train 260 science teachers and administrators in the Pikes Peak region of Colorado to use microcomputers to enhance science learning and teaching; (3) to establish a network in the Pikes Peak region to implement educational computing in school science; and (4) to disseminate a model of implementation for educational computing in school science. The project met its first year objectives and was successful at increasing science teachers' use of microcomputers. Project staff defined and measured implementation according to the Concerns Based Adoption Model (CBAM). Results from pre- and posttests using the Stages of Concern Questionnaire from CBAM indicated that the participants changed from a profile typical of non-users of an innovation toward one typical of users. Project staff developed an Innovation Configuration checklist to describe participants' use of microcomputers. Most of the participants were using microcomputers in several ways by the end of the year. Appendixes include the Microcomputer Use in Science Teaching checklist and the Stages of Concern Questionnaire. A 41-item reference list is also provided. (TW)