This document, jointly developed by the Iowa Department of Public Instruction and a committee of the Iowa Council of Science Supervisors, is designed to encourage and aid local schools in assessing and revising their science curriculum on a continuous basis. Included are: (1) a schedule for conducting a science curriculum assessment and/or revision; (2) a model for assisting schools in developing their science philosophy, goals, and objectives; and (3) recommendations for levels at which suggested objectives are introduced, emphasized, and maintained. Also included are references and, in an appendix, an instrument for matching local science curriculum needs to available science programs. (JN)