“…Working with a population of 155 pupils, Cooper and Sterns (1973) assigned two 4th grades and two 6th grades to a teamteaching condition and one 4th grade and one 6th grade to a solitary-teacher-taught condition. Pre-and posttests included (a) the California Short Form Test of Mental Maturity, 1963 revision, Level 2 for grades 4-6, and (b) the California Reading Test of the California Achievement Tests, 1957Tests, edition, 1963 norms, for grades 4-6.…”