In 2002, voters in Florida approved a constitutional amendment limiting class sizes in public schools to 18 students in the elementary grades, 22 students in middle grades, and 25 in high school grades. Analyzing statewide achievement data for school districts from 2004-2006 and for schools in 2007, this study purports to find that "mandated…

This paper introduces an empirical strategy to estimate dynamic treatment effects in randomized trials that provide treatment in multiple stages and in which various noncompliance problems arise such as attrition and selective transitions between treatment and control groups. Our approach is applied to the highly influential four year randomized…

This report, intended for local and state policy makers and practitioners, summarizes the findings and implications of class-size reduction (CSR) in California. The report's findings provide a comprehensive picture of California's CSR initiative during its first 2 years, covering such topics as implementation, resources, teacher qualifications,…

Summarizes evidence for the effects of class-size reduction from experimental and nonexperimental measurements, addresses questions about the robustness of each type of estimate, and suggests hypotheses that could reconcile differences resulting from conflicting evidence. Discusses potential costs and the implications for future research into the…

The California Legislature and Governor created the Class Size Reduction (CSR) program as part of the 1996-97 Budget Act. The goal of the program is to increase student achievement by reducing average class sizes from 28.6 students to no more than 20 students in up to 3 grades. The 1997-98 governor's budget proposes expansion of the CSR program to…

Confusion over the concepts of class size and pupil-teacher ratio (PTR) creates a conundrum for researchers, policy makers, and practitioners. An examination of how these two concepts are different is presented in this paper. A review of the literature suggests that class-size reduction makes a positive overall difference in student achievement,…

Discussion and research concerning class size can be traced back at least to the 12th century. An overview of recent research on the subject is provided in this report. The paper, which serves as an introduction to a symposium on class size, examines research that has appeared in the past 20 years, but it concentrates on the results of a…

A short overview of an experimental evaluation of lower teacher-pupil ratios is presented in this report. The research under review is the Student Teacher Achievement Ratio (STAR) project. This longitudinal project was conducted in Tennessee and was designed to prove to state legislators the efficacy of smaller class sizes. For STAR, evaluation…

The Educational Priorities Panel carried out a study of the first year of the class size reduction program for grades K-3 in the New York City public schools by visiting five schools throughout the city and interviewing the principal and at least two teachers involved in implementing the program at each school. In all, 17 interviews were…

This study investigated the possible causes of the contradiction between the results of two projects. Indiana's Prime Time project compared the achievement of students in large (averaging 26 students) and small (averaging 19 students) classrooms in grades 1 through 3. Results indicated that 3 years in smaller classes had little effect on student…

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…

Much continues to be written about the failure of U.S. schools to provide a quality education for at-risk urban students. Private Nativity model schools have been instituted in response to the need to provide quality education at the middle school level for such students. As the number of these and other alternative middle schools increases, a…

The Cluster program, funded under Title I of the 1965 Elementary Secondary Education Act, is designed to be a school within a school in which the students receive the benefits of small class size, psychological support, and curricular innovation. The program this year was expanded to include both ninth and tenth year students. The two clusters of…

The Cluster Program at Benjamin Franklin High School, funded under Title I of the 1965 Elementary Secondary Education Act, is designed to be a school within a school in which 249 ninth grade students attend classes in two separate clusters. Each cluster is formulated such that all students receive instruction from five teachers in classes whose…

The impact of class size reduction at the early levels on student achievement in various states is discussed in this report. The Tennessee Student Teacher Achievement Ratio (STAR) study, a statewide longitudinal evaluation of the effects of class size on student achievement and development in primary grades K-3, analyzed demographic and basic…