Koedinger, Kenneth R., Emma Brunskill, Ryan S.J.d. Baker, Elizabeth A. McLaughlin, and John Stamper. “New Potentials for Data-Driven Intelligent Tutoring System Development and Optimization”. AI Magazine 34, no. 3 (September 15, 2013): 27-41. Accessed January 21, 2020. https://www.aaai.org/ojs/index.php/aimagazine/article/view/2484.