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Jitendra, Asha K.; Harwell, Michael R.; Karl, Stacy R.; Im, Soo-hyun; Slater, Susan C. (2018). A Multi-State Study Investigating the Generalizability of a Schema-Based Instructional Approach to Proportional Problem Solving. Society for Research on Educational Effectiveness;
Jitendra, Asha K.; Harwell, Michael R.; Karl, Stacy R.; Slater, Susan C.; Simonson, Gregory R.; Nelson, Gena. (2016). A Replication Study to Evaluate the Effects of Schema-Based Instruction on Middle School Students' Proportional Problem-Solving Performance. Society for Research on Educational Effectiveness.;
Jitendra, A. K., Harwell, M. R., Dupuis, D. N., Karl, S. R., Lein, A. E., Simonson, G., & Slater, S. C. (2015). Effects of a Research-Based Intervention to Improve Seventh-Grade Students’ Proportional Problem Solving: A Cluster Randomized Trial. Journal of Educational Psychology, 107(4), 1019–1034. https://doi.org/10.1037/edu0000039