Boonen, Anton, Helen Reed, Judith Schoonenboom, and Jelle Jolles. “It’s Not a Math Lesson - we’re Learning to Draw! Teachers’ Use of Visual Representations in Instructing Word Problem Solving in Sixth Grade of Elementary School”. Frontline Learning Research 4, no. 5 (December 15, 2016): 34–61. Accessed February 27, 2025. https://flr.journals.publicknowledgeproject.org/index.php/journal/article/view/245.