This research investigated the immediate and long-term effects of a Tier 2 intervention for beginning readers identified as having a high probability of reading failure using a randomized control trial. First-grade participants (n = 123) were randomly assigned either to a 25-session intervention targeting key reading components, including…

The goal of this study was to assess the effectiveness of an intervention--Quality English and Science Teaching 2--designed to help English language learners (ELLs) and their English proficient classmates develop academic language in science, as required by the Common Core State Standards. The intervention consisted of supplementary instructional…

This randomized control trial examined the efficacy of team-based learning implemented within 11th-grade social studies classes. A randomized blocked design was implemented with 26 classes randomly assigned to treatment or comparison. In the treatment classes teachers implemented team-based learning practices to support students in engaging in…

In this experimental study we examined the effects of integrating teacher-directed knowledge-building and student-regulated comprehension practices in 7th- to 10th-grade English language arts classes. We also investigated the effect of instructional quality and whether integrating practices differentially benefitted students with lower entry-level…

This article reports on a large scale randomized controlled trial to study the efficacy of a web-based intelligent tutoring system for the structure strategy designed to improve content area reading comprehension. The research was conducted with 128 fifth-grade classrooms within 12 school districts in rural and suburban settings. Classrooms within…

This study examined the effect of schema-based instruction (SBI) on 7th-grade students' mathematical problem-solving performance. SBI is an instructional intervention that emphasizes the role of mathematical structure in word problems and also provides students with a heuristic to self-monitor and aid problem solving. Using a…

The conventional approaches to mediation analysis such as path analysis and structural equation modeling typically involve specifying two structural models, one for the mediator and the other for the outcome. We employ an alternative approach that avoids some strong identification assumptions invoked by the conventional approaches. By applying a…

Results from randomized controlled trials of learning strategies instruction with 375 adult basic education participants are reported. Reading outcomes from whole group strategic instruction in 1 of 4 learning strategies were compared to outcomes of reading instruction delivered in the context of typical adult education units on social studies,…

This article reports the results from a randomized control field trial that investigated the impact of an enhanced decoding and spelling curriculum on the development of adult basic education (ABE) learners' reading skills. Sixteen ABE programs that offered class-based instruction to Low-Intermediate-level learners were randomly assigned to either…

To compare the efficacy of instructional programs for adult learners with basic reading skills below the 7th-grade level, 300 adults were randomly assigned to 1 of 3 supplementary tutoring programs designed to strengthen decoding and fluency skills, and gains were examined for the 148 adult students who completed the program. The 3 intervention…

This article reports the outcomes of an experimental evaluation of "Read Well Kindergarten" (RWK), a program that focuses on the development of vocabulary, phonological awareness, alphabetic understanding, and decoding. Kindergarten teachers in 24 elementary schools in New Mexico and Oregon were randomly assigned, by school, to teach RWK or their…

This randomized, controlled field trial estimated the causal impact of a technology-based geometry curriculum on students' geometry achievement, as well as their attitudes toward mathematics and technology. The curriculum combines learner-centered classroom pedagogy with individualized, computer-based student instruction. Conducted over a 3-year…

The purpose of the current study was to test the efficacy of a supplemental phonological awareness focused intervention delivered by community-based paraeducators with preschool children (M = 4.73 years) in eight Head Start classrooms in the rural Midwest. Participating children were randomly assigned to small groups within classrooms, which were…

This article reports the effects of a comprehensive elementary school-based social-emotional and character education program on school-level achievement, absenteeism, and disciplinary outcomes utilizing a matched-pair, cluster-randomized, controlled design. The "Positive Action" Hawai'i trial included 20 racially/ethnically diverse schools (M…

The purpose of this study was to investigate the efficacy of an 18-week program of direct and extended vocabulary instruction with kindergarten students on both proximal measures of target word knowledge and transfer measures of generalized language and literacy. A second purpose was to examine whether treatment effects would be moderated by…