Introduction: The What Works Clearinghouse (WWC) reviews rigorous research on educational interventions with a goal of identifying "what works" and making that information accessible to educators and policymakers. In rating the quality of causal research, the WWC has historically prioritized internal validity over external validity. One…

Problem-based learning (PBL) can take many different shapes but has as a common denominator that it builds on the principles of collaborative, constructive, contextual, and self-directed learning. Systematic review approaches that aim to provide insight in what features make PBL work generally fall short, as they tend to disregard the influential…

In this meta-analysis of single-case designs, the researchers investigated the effects of word-problem instruction for students with learning disabilities in Grades 1 through 12, as reported in 20 peer-reviewed articles published between 1975 and 2020. A two-level multilevel model with a robust variance estimation method was implemented to…

Multiple imputation (MI) is a popular method for handling missing data. In education research, it can be challenging to use MI because the data often have a clustered structure that need to be accommodated during MI. Although much research has considered applications of MI in hierarchical data, little is known about its use in cross-classified…

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:…

Systematic reviews of single-case experimental research (SCER) in special education often use the What Works Clearinghouse (WWC) Standards to assess the methodological rigor of studies within a given literature base. While significant changes were made between the two most recent versions of the WWC standards, no research to date has evaluated the…

Since the first descriptions of design research (DR), there have been calls to better define it to increase its rigour. Yet five uncertainties remain: (1) the processes for conducting DR, (2) how DR differs from other forms of research, (3) how DR differs from design, (4) the products of DR, and (5) why DR can answer certain research questions…

Background/purpose: This study aimed to identify publication trends regarding the implementation of Project Based Learning (PjBL) in junior high schools over a specific period based on bibliometric data; To analyze the most frequently occurring keywords in the PjBL literature for junior high schools to understand the main research focus; To…

School-wide Positive Behavioral Interventions and Supports (SWPBIS) is an inclusive multi-tiered system of behavioral supports that has been widely adopted by K-12 schools in the United States. SWPBIS focuses on creating safe, equitable, and inclusive school environments and has been linked to both positive behavioral and academic outcomes for…

Background: Among the most contested topics within special education research concerns racial disparities in students identified with disabilities. This phenomenon, referred to as disproportionality in special education placement, is historically rooted in concerns surrounding the overrepresentation of Black students in special education across…

A substantial number of randomized trials of educational interventions that have been conducted over the past two decades have produced null results, with either no impact or an unreliable estimate of impact on student achievement or other outcomes of interest. The investment of time and money spent implementing such trials warrants more useful…

Over the past 15 years, we have seen an increase in the use of cluster randomized trials (CRTs) to test the efficacy of educational interventions. These studies are often designed with the goal of determining whether a program works, or answering the what works question. Recently, the goals of these studies expanded to include for whom and under…

That idea that problem-based learning (PBL) is more motivating that traditional education has been prevalent since the inception of PBL at McMaster University in the late 1960s. Evidencing this through empirical research, however, has proven to be a lot more problematic. This paper retraces how the discourse on motivation started from a laymen's…

Social-emotional skills are essential for preschool children's mental health and later school success. Considering the variety of school-based interventions aiming to target SEL development, it remains unclear what programs can be considered evidence-based, and what features characterize well-established programs. Hence, the current systematic…

Children's early problematic behaviour correlates with later deviant behaviour. The Incredible Years Teacher Classroom Management (IY TCM) programme trains teachers in proactive strategies to disrupt patterns of negative child behaviour. This mixed methods systematic review applies multilevel meta-analysis and qualitative meta-synthesis to answer:…