Boonen, A., Reed, H., Schoonenboom, J. and Jolles, J. (2016) “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(5), pp. 34–61. doi: 10.14786/flr.v4i5.245.