This digest addresses principles of planning science programs for high ability learners. It notes various evaluation reports that have reviewed needs in science learning and teaching, identified essential science concepts and processes, and evaluated teacher enhancement programs and curricula. Research on gifted learners in science is briefly reviewed, noting the effectiveness of accelerated courses for groups of students with high science aptitudes and the value of problem-based learning in teaching science to this population. The digest identifies the following important elements of a science curriculum for gifted students: an emphasis on learning concepts; an emphasis on higher level thinking; an emphasis on inquiry, especially problem-based learning; an emphasis on the use of technology as a learning tool; and an emphasis on learning the scientific process by using experimental design procedures. Teachers are urged to consider the following approaches to science curriculum reform: (1) selection of modular materials rather than basals for classroom use; (2) training of teachers in content-based pedagogy; and (3) employment of curriculum monitoring processes in schools. The Curriculum Reform Classroom Indicators checklist is attached. (DB)