Proceedings of the Annual Meeting of the Cognitive Science Society

An abundance of empirical evidence has amassed supporting the effectiveness of having students explain why correctproblem solutions are correct (Aleven & Koedinger, 2002; Hilbert, Renkl, Kessler, & Reiss, 2008) as well as why incor-rect problem solutions are incorrect (Durkin & Rittle-Johnson, 2012; Grosse & Renkl, 2006). However, despite strongtheoretical background for the approaches (e.g., Sweller, 1999; Siegler, 2002) and the growing amount of empirical ev-idence collected in real-world classrooms for students in middle school and above (e.g., Adams et al., 2014; Booth etal, 2015) it is yet unknown whether prompting self-explanation of correct and incorrect examples could be effectivelytranslated for elementary school mathematics classroom. In this project, we worked with elementary school teachers andmathematics coaches to construct developmentally appropriate worked-example assignments for 4th graders; the presentstudy tests the effectiveness of these collaboratively developed assignments for different topics in ethnically diverse 4thgrade classrooms.