The Outdoor Activity Center (Atlanta, Georgia) provides enriched experiences in a natural environment for economically disadvantaged gifted primary grade students and has developed materials incorporating creative activities used at the Center to expand the elementary science curriculum of the Atlanta Public Schools. Fifty-eight gifted students went to the Center for planned creative onsite experiences related to environmental science instruction for 90-minute sessions once a week for 15 weeks. Teachers accompanied the students, observed the instruction presented to the students, and utilized learning units at their local school to followup instruction provided at the Center. Two other groups of gifted Ss in the first control group were given the learning units within their own school with no Center experience. Project staff provided orientation to the teachers of student participants and to teachers from the control schools. The Metropolitan Achievement Tests (MAT) were used as pre-post test measures. After completion of all 15 sessions, project teachers and staff used materials and experiences to write and compile model science units. Each curriculum unit contained student objectives (cognitive and affective), thought processes/skills to be developed, instructional materials needed, content, questions to be considered by students, activities and strategies, and evaluation procedures. Among findings were that the students who received the special, environmental education instruction within their home school (control 1) demonstrated better performance than either the students who attended the Center for the instruction or those who did not participate in the project (control 2). Included is a copy of "A Challenge in Science," an elementary science curriculum guide with units covering such topics as food stuff, time, physical matters, classification, the earth in regions, planets on the move, and weather. Appended materials include guidelines for keeping a journal, a table on measuring wind velocity, things to look for in identifying birds, a guide of things to make from old milk cartons, and instructions for decorating bottles. (SW)