颁布单位：[the University of Pittsburgh] |  颁布时间：2015 |  实施时间：2015 |  学科分类：[tutoring,, intelligent, tutoring, system,, student, modeling,, dialogue,, graphs,, illustrations,, physics]

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颁布单位：[the University of Pittsburgh] |  颁布时间：2012 |  实施时间：2012 |  学科分类：[knowledge, representation,, knowledge, acquisition,, natural, language, understanding,, intelligent, tutoring, system., authoring, system,, physics, problem, solving]

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