The Matlen-Rohrer Replication Project
A Systemic Replication Study of Interleaved Mathematics Practice
Replication Project Type and Approach: Efficacy Replication, Systemic Replications Using Digital Platforms
We will specifically conduct the study with a representative sample of students in the U.S. east coast with a diverse representation of mathematical proficiency, socioeconomic background, gender, and ethnicity. Our proposed study replicates and extends prior work by; including educationally relevant outcome measures, including students at a variety of proficiency levels, testing long term retention, and leveraging the ASSISTments digital mathematics learning platform. As interleaved practice appears to be highly effective yet scarcely used intervention that can be inexpensively implemented in nearly any mathematics course, the findings from our replication will be of interest to researchers, practitioners and policymakers.
The study will involve a cluster-randomized trial, randomizing classrooms within teachers to implement interleaved practice problems or blocked practice problems in the grade 7 mathematics school year. Seventy grade 7 teachers across the U.S. east coast will participate, with approximately 189 classrooms, and 3780 students. Student outcomes will be assessed at the end of the school year on proximal and distal tests as well as at the beginning of the 8th grade year. The study will collect fidelity and implementation data and will conduct a cost analysis to assess its scalability.