Understanding the effects of class size reduction (CSR) has been an enduring issue in education. For the past 3 decades, Project STAR has stimulated research and policy discussions regarding the effects of CSR on a variety of outcomes. Schanzenbach (2007) reviewed STAR studies and concluded that small classes improved student academic outcomes.…

A consistent body of research shows that large classes have been perceived by teachers as an obstacle to deliver quality teaching. This large-scale study sought to investigate further those differential effects by asking 1,119 teachers from 321 K-12 schools in New South Wales (Australia) their perceptions of ideal class size for a variety of…

Class size is one of the small number of variables in American K-12 education that are both thought to influence student learning and are subject to legislative action. Legislative mandates on maximum class size have been very popular at the state level. In recent decades, at least 24 states have mandated or incentivized class-size reduction…

There is still little consensus on whether and how teaching is affected by small and large classes, especially in the case of students in the later primary years. This study investigated effects of class size on teaching of pupils aged 7-11 years. We used a multimethod approach, integrating qualitative information from teachers' end-of-year…

Preschool for All (PFA) is a part-day (2.5 hours for up to five days a week) early childhood education program for 3- and 4-year-olds in Illinois. The program is voluntary to families and is designed to be a high-quality preschool option for all children--especially those at risk of academic failure. PFA was implemented in 2006 and is free to…

This literature review focuses on the effects of class size on styles of teaching practice, and on pupil behavior and attainment. Most of the literature is from the United States. Evidence from previous reviews, correlational studies, meta-analyses, and experimental interventions are presented in this document. Much of the existing evidence is at…

This report addresses some of the concerns surrounding smaller classes and looks at whether reduced class sizes result in higher achievement levels, and concludes that it in fact does increase student achievement, so long as classes do not exceed 17 students. But many critics question whether the high cost of reducing classes to 17 or fewer…

Despite evidence from the USA that children in small classes of less than 20 do better academically there is still a vociferous debate about the effects of class size differences in schools, and considerable gaps in our understanding of the effects of class size differences. This article summarises results from the most complete UK analysis to…

It is widely assumed that increasing the number of teaching assistants (TAs) in the classroom will be beneficial to children, and this is one important aim of the recently implemented Workforce Agreement. But there are still significant gaps in knowledge about many aspects of their deployment and impact. The Class Size and Pupil-Adult Ratios…

Given the failure of previous research to find consistent effects of class size on students' achievement, this study examined whether teachers in British elementary schools changed their behavior in ways conducive to learning when they worked with classes significantly smaller than average. Seven pairs of elementary school teachers judged as…

Relevant research literature does not generally support the notion that class size is a significant variable in learner achievement. This, if true, may be the result of various factors. Although teachers believe that they alter their teaching strategies for different class sizes, this may not be the case. More likely is the possibility that…

This book synthesizes research evidence to demonstrate that 1) class size is strongly related to pupil achievement; 2) smaller classes are more conducive to improved pupil performance than larger classes; 3) smaller classes provide more opportunities to adapt learning programs to individual needs; 4) pupils in smaller classes have more interest in…