The What Works Clearinghouse (WWC) seeks to provide practitioners information about "what works in education." One challenge in understanding "what works" is that effect sizes may not be comparable across studies, which limits the ability to compare the relative effectiveness of multiple interventions. One factor that…

The What Works Clearinghouse (WWC) Study Review Protocol accompanies the "WWC Procedures and Standards Handbook, Version 5.0," and guides reviews of studies by the WWC. The WWC uses this protocol to review all studies, including those cited as evidence for U.S. Department of Education grant competitions, studies that were funded by the…

The What Works Clearinghouse (WWC) is an initiative of the U.S. Department of Education's Institute of Education Sciences (IES), which was established under the Education Sciences Reform Act of 2002. It is an important part of IES's strategy to use rigorous and relevant research, evaluation, and statistics to improve the nation's education system.…

This protocol guides the review of research that informs the What Works Clearinghouse (WWC) practice guide in the topic area of Effective Advising for Postsecondary Students. The review protocol is used in conjunction with the "WWC Procedures Handbook" and the "WWC Standards Handbook (versions 4.0)." The purpose of the…

The What Works Clearinghouse (WWC) systematic review process is the basis of many of its products, enabling the WWC to use consistent, objective, and transparent standards and procedures in its reviews, while also ensuring comprehensive coverage of the relevant literature. The WWC systematic review process consists of five steps: (1) Developing…

This review-specific protocol guides the review of research that informs the What Works Clearinghouse (WWC) intervention reports in the English learners (EL) topic area. The review-specific protocol is used in conjunction with the "WWC Procedures and Standards Handbooks (version 4.0)." ELs are among the fastest-growing population in U.S.…

The study reviewed here examined whether taking a course with a tenure track professor versus a non-tenure track professor for first-term freshman-level courses (e.g., introductory economics) had an impact on students' future enrollment and performance in classes in the same subject. Data from 15,662 students who entered Northwestern University,…

The study, "The Impact of Indiana's System of Interim Assessments on Mathematics and Reading," examined the effects of using Diagnostic Assessment Tools (DAT) on mathematics and reading outcomes for students in 59 Indiana schools during the 2009-10 academic year. DAT consists of interim assessment tools--Wireless Generation's mCLASS for…

The study reviewed in this paper examined whether "Playworks," a program that utilizes full-time coaches to provide structured play opportunities during recess and class time, reduces the number of disciplinary referrals in low-income elementary schools. Study authors randomly assigned 25 schools in five US cities to either a…

What Works Clearinghouse (WWC) reviews in this topic area focus on dropout prevention interventions designed for use in secondary school (middle school, junior high school, and high school) or community-based settings to help students stay in school, progress in school, and/or complete school. Systematic reviews of evidence in this topic area…

The 2011 study, "Benefits of Practicing 4 = 2 + 2: Nontraditional Problem Formats Facilitate Children's Understanding of Mathematical Equivalence," examined the effects of addition practice using nontraditional problem formats on students' understanding of mathematical equivalence. In nontraditional problem formats, operations appear on…

"Spelling Mastery" is designed to explicitly teach spelling skills to students in grades 1 through 6. One of several Direct Instruction curricula from McGraw-Hill that precisely specify how to teach incremental content, "Spelling Mastery" includes phonemic, morphemic, and whole-word strategies. The What Works Clearinghouse…

"SpellRead"[TM], formerly known as "SpellRead Phonological Auditory Training"[R], is a small-group literacy program for struggling readers in grades 2-12. "SpellRead"[TM] integrates the auditory and visual aspects of the reading process and emphasizes specific skill mastery through systematic and explicit instruction.…

The study examined the impact of "POWERSOURCE"[C], an intervention consisting of formative assessments, instructional resources, and professional development designed to help teachers provide individual instruction to their students in Algebra I. This study took place in seven districts in Arizona and California during the 2007-08 school…

The study reviewed in this document examined the effects of a comprehensive teacher induction program for beginning teachers (i.e., teachers new to the profession) on teacher and student outcomes in 17 school districts across 13 states. The program includes mentoring, monthly professional development sessions, study groups with other beginning…