Foundational Approaches in Science Teaching (FAST) is a program which is intended to facilitate student transition from the general science process programs of elementary schools to the discipline-oriented programs of high school. This guide has been developed to provide an overview of the total program as well as a description of the instructional materials and strategies. The information in the document: (1) explains the assumptions, goals, and objectives of the FAST program; (2) describes the content of the three FAST levels (the local environment--FAST 1; flow of matter and energy in the biosphere--FAST 2; and change over time--FAST 3); (3) outlines alternative time schedules and sequences of student investigations; (4) identifies teacher and student materials and their use; and (5) suggests general strategies for classroom organizations and management. Particular attention is given to guidelines for planning and conducting effective group interactions for problem solving situations. (TW)