This meta-analysis synthesizes the literature on interventions for struggling readers in Grades 4 through 12 published between 1980 and 2011. It updates Scammacca et al.’s analysis of studies published between 1980 and 2004. The combined corpus of 82 study-wise effect sizes was meta-analyzed to determine (a) the overall effectiveness of reading interventions studied over the past 30 years, (b) how the magnitude of the effect varies based on student, intervention, and research design characteristics, and (c) what differences in effectiveness exist between more recent interventions and older ones. The analysis yielded a mean effect of 0.49, considerably smaller than the 0.95 mean effect reported in 2007. The mean effect for standardized measures was 0.21, also much smaller than the 0.42 mean effect reported in 2007. The mean effects for reading comprehension measures were similarly diminished. Results indicated that the mean effects for the 1980–2004 and 2005–2011 groups of studies were different to a statistically significant degree. The decline in effect sizes over time is attributed at least in part to increased use of standardized measures, more rigorous and complex research designs, differences in participant characteristics, and improvements in the school’s “business-as-usual” instruction that often serves as the comparison condition in intervention studies.

This study aimed to determine the efficacy of a content acquisition and reading comprehension treatment implemented by eighth‐grade social studies teachers. Using a within‐teacher design, the eighth‐grade teachers’ social studies classes were randomly assigned to treatment or comparison conditions. Teachers (n = 5) taught the same instructional content to both treatment and comparison classes, but the treatment classes used instructional practices focused on teaching essential words, text as a source for reading and discussion, and team‐based learning approaches. Students in the treatment conditions (n = 261) scored statistically higher than students in the comparison conditions (n = 158) on all three outcomes: content acquisition (ES = 0.17), content reading comprehension (ES = 0.29), and standardized reading comprehension (ES = 0.20). Findings are interpreted as demonstrating support for the treatment in improving both knowledge acquisition and reading comprehension within content area instruction.

Research suggests that contextual, self-system, and school engagement variables influence dropping out from school. However, it is not clear how different types of contextual and self-system variables interact to affect students’ engagement or contribute to decisions to dropout from high school. The self-system model of motivational development represents a promising theory for understanding this complex phenomenon. The self-system model acknowledges the interactive and iterative roles of social context, self-perceptions, school engagement, and academic achievement as antecedents to the decision to dropout of school. We analyzed data from the Education Longitudinal Study of 2002–2004 in the context of the self-system model, finding that perception of social context (teacher support and parent support) predicts students’ self-perceptions (perception of control and identification with school), which in turn predict students’ academic and behavioral engagement, and academic achievement. Further, students’ academic and behavioral engagement and achievement in 10th grade were associated with decreased likelihood of dropping out of school in 12th grade.

This synthesis extends a report of research on extensive interventions in kinder-garten through third grade (Wanzek & Vaughn, 2007) to students in Grades 4 through 12, recognizing that many of the same questions about the effectiveness of reading interventions with younger students are important to address with older students, including (a) how effective are extensive interventions in improving reading outcomes for older students with reading difficulties or disabilities and (b) what features of extensive interventions (e.g., group size, duration, grade level) are associated with improved outcomes. Nineteen studies were synthesized. Ten studies met criteria for a meta-analysis, reporting on 22 distinct treatment/comparison differences. Mean effect sizes ranged from 0.10 to 0.16 for comprehension, word reading, word reading fluency, reading fluency, and spelling outcomes. No significant differences in student outcomes were noted among studies related to instructional group size, relative number of hours of intervention, or grade level of intervention.

The authors conducted an experimental study to examine the effects of collaborative strategic reading and metacognitive strategic learning on the reading comprehension of students in seventh-and eighth-grade English/ language arts classes in two sites (Texas, Colorado) and in three school districts. Students were randomly assigned to classes and then classes were randomly assigned to treatment or business-as-usual comparison groups. If a teacher had an uneven number of classes, we assigned extra classes to treatment. The total number of classes randomized was 61, with 34 treatment and 27 comparison. Treatment students received a multicomponent reading comprehension instruction (collaborative strategic reading) from their English/language arts/reading teachers that included teaching students to apply comprehension strategies in collaborative groups for 18 weeks, with approximately two sessions per week. Findings indicated significant differences in favor of the treatment students on the Gates-MacGinitie Reading Comprehension Test but not on reading fluency.