Multiple meta-analyses have now documented small positive effects of teacher professional development (PD) on pupil test scores. However, the field lacks any validated explanatory account of what differentiates more from less effective in-service training. As a result, researchers have little in the way of advice for those tasked with designing or…

Clearinghouses set standards of scientific quality to vet existing research to determine how "evidence-based" an intervention is. This paper examines 12 educational clearinghouses to describe their effectiveness criteria, to estimate how consistently[underlined] they rate the same program, and to probe why their judgments differ. All the…

Research increasingly seeks to answer the question: does special education work? This is different than asking if specific interventions have positive effects and instead aims to identify system-wide impacts. We systematically review published quantitative research on the impact of receiving special education services on student outcomes using…

We quantitatively synthesized findings of quasi-experimental and randomized control studies of interventions designed to improve the mathematics achievement of secondary school students with mathematics difficulties (MD). We identified 45 studies (49 interventions) published between 1978 and 2020 and classified interventions into five categories:…

Increasing class size is one of the key variables that policy makers can use to control spending on education. But the consensus among many education researchers is that smaller classes are effective in improving student achievement. This view has led to a policy of class size reductions in a number of US states, the UK, and the Netherlands. This…

The implementation of context-based chemistry programs has been started before 40 years ago since 1980s in an attempt to make the learning of chemistry more meaningful for students. Consequent to its lengthy, there has been a steady increase in the number of interventional context-based (ICB) approach chemistry studies investigating the effect of…

The field of open education and research on the topic has notably expanded since the introduction of the term 20 years ago. Given these developments, a framework to structure research inquiry is necessary to ground and organize findings in open education. We propose the SCOPE framework for open education research: social justice, cost, outcomes,…

Charter schools are highly debated in policy and political discussions about delivering public education. As "laboratories of innovation" that often use lotteries to assign spots, they hold the potential to generate rigorous evidence about effective educational practices. This paper synthesizes and summarizes findings from charter…

Large numbers of students who enroll in college do not complete a degree. Yet, earning a college degree is one of the primary pathways for economic success and is increasingly required for good jobs and high wages. The way students interpret early academic struggles in college may affect whether or not they remain enrolled. If students attribute…

Large numbers of students who enroll in college do not complete a degree. If students attribute their academic challenges to a perceived lack of intelligence or inability to succeed in college, they may be less likely to persist. "Growth Mindset" interventions aim to improve college persistence and academic achievement by encouraging…

"Growth Mindset" interventions aim to improve college persistence and academic achievement by encouraging students to view intelligence as a "malleable" characteristic that grows with effort, and to view academic challenges as temporary setbacks that they can overcome. This What Works Clearinghouse (WWC) report explores the…

In this chapter, we describe and compare the standards for evidence used by three entities that review studies of education interventions: Blueprints for Healthy Youth Development, Social Programs that Work, and the What Works Clearinghouse. Based on direct comparisons of the evidence frameworks, we identify key differences in the level at which…

The purpose of this study was to present, compare, and contrast data collected from rural Georgia educators concerning their beliefs and knowledge of the benefits of student retention. The researcher identified the most common areas of agreement and disagreement among educators concerning grade-level retention. Additionally, the researcher…

The past three decades have seen charter schools emerge as a prominent and controversial alternative to traditional public schools. This policy brief examines "Thirty Years of Charter Schools: What Does Lottery-Based Research Tell Us?" which summarizes 40 studies that have used lottery research designs to analyze how charter schools…

Success for All (SFA) is a comprehensive whole-school approach designed to help high-poverty elementary schools increase the reading success of their students. It is designed to ensure success in grades K-2 and then build on this success in later grades. SFA combines instruction emphasizing phonics and cooperative learning, one-to-small group…