“…Since then the work has greatly expanded in its dissemination-over 500,000 students a year use the Cognitive Tutor Algebra course (e.g., Ritter, Anderson, Koedinger, & Corbett, 2007)-and in its scope-Cognitive Tutors and variations thereof have been created for a wide variety of content, including intercultural competence (Ogan, Aleven, & Jones, 2010), statistics (Lovett, Meyer, & ille, 2008), chemistry (Yaron et al, 2010), and genetics (Corbett, Kauff man, MacLaren, Wagner, & Jones, 2010). Many large-scale evaluations of these courses have demonstrated their eff ectiveness (Ritter, Kulikowich, Lei, McGuire, & Morgan, 2007).…”