Seven of the students script; Mr. Rex Shanks, Mr. Frank A. Branagan, and had been referred several times by the teacher Mrs. Betty Roberts for their invaluable help in con- to the school principal for such problems as ducting the study; and Mrs. Susan Zook, Mrs. Sue out-of-seat behavior, indiscriminate noise and Chen, and Mr. Jay Barrish for their contributions of talking, uncooperativeness, and g