Study authors Jeremy D. Finn, Ph.D., and Susan B. Gerber, Ph.D., of the University at Buffalo-The State University of New York and Jayne Boyd-Zaharias, Ed.D., of HEROS, Inc., tracked nearly 5,000 students from kindergarten through the 12th grade in 165 schools in connection with Tennessee's class-size experiment of the 1980's. The experiment, known as Project STAR, involved randomly assigning students entering kindergarten to a small class (13-17 students), to a full-size class (22-26 students), or to a full-size class with a full-time teacher aide within each participating school. The class size was maintained throughout the day and all year long. Students were kept in the same class arrangement for up to four years, with a new teacher assigned at random to the class each year.
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