Interest in the regression discontinuity (RD) design as an alternative to randomized control trials (RCTs) has grown in recent years. There is little practical guidance, however, on conditions that would lead to a successful RD evaluation or the utility of studies with underpowered RD designs. This article describes the use of RD design to evaluate the impact of a supplemental algebra-readiness curriculum, Transition to Algebra, on students’ mathematics outcomes.
The Discovery Research K-12 (DR K-12) Program of the National Science Foundation (NSF) supports research and development (R&D) on innovative resources, models, and tools for use by students, teachers, administrators, and policy makers. Each project has formative and summative evaluation, which are different from the project’s own R&D activities and instead should support and measure the effectiveness of those activities.
Evaluation options for investigators and evaluators to consider could include the following: