Described is a five-week summer institute sponsored by the National Science Foundation for 35 teachers and administrators interested in implementing "AAAS Science - A Process Approach." Institute activities included those suggested in the AAAS "Guide for In-Service Training," with additional activities beginning the fifth week which required a synthesis of the individual process skills previously developed. Pre- and post-administrations of the "Science Process Measure for Teachers" indicated marked improvement in the nine areas of competency considered. A teacher-pupil verbal interaction analysis was performed before and after the institute in 18 classrooms with the results that the average teacher talking time went from 52.7 to 50.7 percent, student talking time from 29.4 to 19.5 percent, and silent activity time from 17.9 to 29.8 percent. An experiment conducted after the summer institute showed that 42 students in an experimental group using "AAAS Science - A Process Approach" scored significantly higher on 3 of 4 competency tasks than did 38 control group students using other materials. [Not available in hardcopy due to marginal legibility of original document.] (PR)