A SERIES OF EXPERIMENTS WAS CONDUCTED TO TEST THE EFFECTIVENESS OF TELEVISED INSTRUCTION. THIS STUDY, THE SEVENTH IN A SERIES, EVALUATED THE EFFECTIVENESS OF THREE PROCEDURES TO STIMULATE STUDENT EXTRACURRICULAR SCIENCE ACTIVITIES. IN THE FIRST PROCEDURE THE PRESENTATION METHOD, ADULT INSTRUCTORS PERFORMED THE EXPERIMENTS IN ONE VERSION AND STUDENTS PERFORMED THE EXPERIMENTS IN ANOTHER VERSION. IN THE STUDENT-DEMONSTRATOR VERSION THE SECOND PROCEDURE WAS INTRODUCED. THREE EXPERIMENTS WERE PERFORMED TO COMPLETION AND ANOTHER THREE WERE BEGUN BUT CUT OFF BEFORE COMPLETION. FOLLOWING TELEVISED PRESENTATION, A THIRD PROCEDURE WAS INTRODUCED IN WHICH SOME CLASSES WERE PROVIDED WITH KITS AND INSTRUCTION TO ENABLE STUDENTS TO PERFORM THE EXPERIMENTS, AND STUDENTS IN OTHER CLASSES WERE GIVEN POSTCARDS OR ONLY INFORMATION SO THEY COULD WRITE IN FOR KITS. THE RESULTS WERE--(1) MORE STUDENTS WHO WATCHED FELLOW STUDENTS PERFORM EXPERIMENTS PERFORMED ON THEIR OWN THAN DID THOSE STUDENTS WHO WATCHED ADULT INSTRUCTORS, (2) THE MORE DIRECTLY AVAILABLE THE KITS WERE, THE MORE LIKELY STUDENTS WERE TO PERFORM AN EXPERIMENT, AND (3) THE COMPLETED EXPERIMENTS WERE NOMINATED AS ONES THE STUDENTS WANTED TO PERFORM MORE OFTEN. RELATED REPORTS ARE ED 003 646 THROUGH ED 003 653. (JC)