WWC Single Case Design Training, Module 2: Single-Case Designs

Module 2 of the What Works Clearinghouse (WWC) Single Case Design Standards Training covers general features that are characteristic to single-case designs and describes some common single-case design variations that the WWC reviews. In this module, we cover how to assess whether a study is eligible for review as a single-case design under the What Works Clearinghouse (WWC) Single Case Design Standards.


The WWC is an investment of the Institute of Education Sciences (IES) within the U.S. Department of Education and was established in 2002. The work of the WWC is managed by a team of staff at IES and conducted under a set of contracts held by several leading firms with expertise in education, research methodology, and the dissemination of education research. For more than a decade, the WWC has been a central and trusted source of scientific evidence on education programs, products, practices, and policies. We review the research, determine which studies meet rigorous standards, and summarize the findings. We focus on high-quality research to answer the question, “What works in education?”