Reviews research into class size effects from a methodological viewpoint, concentrating on various strengths and weaknesses of randomized controlled trials (RCT) and observational studies. Discusses population definitions, causation, and generally sets out criteria for valid inferences from such studies. Illustrates with new findings from data in…

This review has two parts: the first concerns class size and general education; the second, class size and special education. The general education review is in four sections: (1) foundational class size research; (2) critiques of the foundational works; (3) extended research; and (4) five studies in class size research conducted by states. The…

As a result of the Morgan-Hart Class Size Reduction Act of 1989, San Juan (California) Unified School District was able to reduce the number of students in freshman English classes from over 30 to 20 in the spring semester 1991. This reduction of at least 10 students per class was a welcome change for high school students and their teachers. The…

Educational research, unfortunately, often focuses on finding statistical differences between overall means or averages. Media reports of research routinely present those differences and little else. This paper discusses the importance of considering the spread of the data in addition to the center and how this is relevant to research focused on…

Discusses research (Tennessee Study of Class Size) that determined the effects of smaller class size in the earliest grades on short- and long-term pupil performance. The 4-year study assessed the performance of over 6,500 students who attended K-3 classrooms having differing numbers of students and found evidence of short- and long-term benefits…

This report summarizes research on the effects of class size reduction, outlines lessons learned from large-scale class size reduction initiatives in California and Wisconsin, and draws out implications of the research and lessons for class size reduction in North Carolina. The evidence that smaller classes promote increased learning is strongest…

During 1999/2000, the Saginaw, Michigan public schools implemented a reduced class size program in grades 1 and 2. At grade 1 (23 rooms), reduced-size classes were maintained at no more than 18 pupils; at grade 2 (5 rooms), the limit was 21 pupils. Comparison classes were identified to assess the impact of the program. Students in both conditions…

Article reanalyzes and expands upon data from Tennessee's Project STAR which examined the effects of class size reduction on student achievement in the primary grades. It describes six competing theories of class size impact on achievement and test performance, settling on the student group/modeling interpretation of study data. (SM)

Examines whether class size in the introductory-level economics course affects subsequent performance in intermediate-level economics courses. Studies University of Massachusetts (Boston) students who are allowed to choose large or small lecture classes. Finds that students enrolled in large sections received lower grades in subsequent…

While the desirability of small classes seems an article of faith among educators, a review of the research indicates that class size in itself has rarely shown a substantial effect on educational achievement. The research itself has been flawed by the impossibility of determining or measuring all the variables that changes in class size can…

"Smaller is better" is often the mantra of school leaders with regard to class size, while the benefits of smaller schools are ignored. Benefits of small classes seem obvious--teachers with fewer students could devote more time to each student. Conducted in 1985-89, Tennessee's Project STAR (Student/Teacher Achievement Ratio) found that…

This analysis outlines the generally inconclusive nature of class size research. In the area of achievement as it relates to class size, the research is demonstrated to be especially inconclusive. In addition to analyzing the problems and weaknesses of class size research, this paper summarizes the effects of class size on the educational process…

Research findings identifying the most effective class size are found to be inconclusive. Some studies have found small classes more effective, others have favored large classes, and some have found no differences in learning effectiveness due to class size. A number of these studies are cited and points of agreement noted. In a second section…

Reports that the debate over class size in schools has become more heated in recent years. Examines recent research and attempts to answer three questions regarding class size and academic achievement. Concludes that there is a link between the 2, but only in the early years and only with classes smaller than 20 students. (CFR)