Effects of a research-based intervention to improve seventh-grade students’ proportional problem solving: A cluster randomized trial

Journal of Educational Psychology (2015) - Comment
doi: 10.1037/edu0000039 issn: 1939-2176 issn: 0022-0663

Asha K. Jitendra, Michael R. Harwell, Danielle N. Dupuis, Stacy R. Karl, Amy E. Lein, Gregory Simonson, Susan C. Slater