There is increasing interest in meta-analysis in different fields due to the need to combine the results of primary research. One of the crucial concepts in combining results is weighting. This study examines how Hunter and Schmidt's method, weighting by sample size; Hedges and Vevea's method, weighting by inverse variance; and Osburn and…

"Jigsaw" is a peer learning procedure derived from social interdependence theory, which suggests that individuals positively linked by a common goal can benefit from positive and promotive social interactions (Aronson & Patnoe, 2011). Although jigsaw has often been presented as an efficient way to promote learning, empirical research…

The purpose of this meta-analysis was to assess the overall effects of automaticity training of fundamental literacy component skills (i.e., letter names/sounds, individual words) on reading fluency and comprehension. Another purpose was to assess if the effects of automaticity training varied for reading fluency and comprehension. We identified…

In this meta-analysis, the authors synthesize results from 44 (quasi-)experimental studies on informational and narrative text structure interventions involving students in grades 4-6 in regular school settings. Findings show that text structure instruction had positive immediate effects on students' reading comprehension but that effect sizes…

Most students with reading difficulties struggle to read words. We examined intervention effects for students with "significant" word reading difficulties (SWRD; standard score of 80 on at least one pretest measure of word reading), which includes individuals with or at risk for dyslexia. We investigated: (a) What are the effects of…

This systematic review examines empirical research about students' motivation for NAEP in grades 4, 8, and 12 using multiple motivation constructs, including effort, value, and expectancy. Analyses yielded several findings. First, there are stark differences in the perceived importance of doing well on NAEP among students in grades 4 (86%), 8…

Focusing on the variables that can affect both academic achievement and the well-being of students has been crucial for their development, making schools effective and designing educational policy as well as curriculum. The study has aimed to investigate the effect of peer bullying on academic achievement and to determine moderators in the…

Background: The topic of gender differences in mathematical performance has received considerable attention in the fields of education, sociology, economics and psychology. Aims: We analysed gender differences based on data from the Beijing Assessment of Educational Quality in China. Sample: A large data set of Grade 5 and Grade 8 students who…

In this meta-analysis, I have reviewed published and unpublished research on single-track, year-round education's effect on science and social studies achievement, 2001-2016. Of 30 studies that met inclusion criteria and had data from which an effect size estimate could be calculated, 7 reported science outcomes (18 effect size estimates) or…

This paper reviews prior research to assess the effectiveness of Title I in closing the achievement gaps of disadvantaged students vis-à-vis their non-disadvantaged counterparts. A research synthesis approach is adopted to summarize national assessments of Title I conducted between 1966 and 2011. These analyses are supplemented by the authors'…

This conceptual article provides an overview and critique of the major versions of multiple comprehension strategies instruction (MCSI) that have been studied since 1980. The author argues that MCSI is a multifaceted instructional approach that takes on many different forms in the research literature. Even intervention studies that ostensibly…

Gender gaps in the development of mathematical and scientific literacy have important implications for the general public's understanding of scientific issues and for the underrepresentation of women in science, technology, engineering, and math. We subjected data from the National Assessment of Educational Progress to a meta-analysis to examine…

This meta-analysis reviews experimental and quasi-experimental studies in which upper-elementary, intermediate, and secondary students with learning disabilities learned from graphic organizers. Following an exhaustive search for studies meeting specified design criteria, 55 standardized mean effect sizes were extracted from 16 articles involving…

To determine whether formative writing assessments that are directly tied to everyday classroom teaching and learning enhance students' writing performance, we conducted a meta-analysis of true and quasi-experiments conducted with students in grades 1 to 8. We found that feedback to students about writing from adults, peers, self, and computers…

This article presents a meta-analysis of experimental and quasi-experimental studies in which intermediate and secondary students with learning disabilities were taught science content through the use of graphic organizers (GOs). Following an exhaustive search for studies meeting specified selection criteria, 23 standardized mean effect sizes were…