Martha Palmer and Barbara Di Eugenio Interview Martha Evens

strategies and student behaviors, including differences between face-to-face and computer-mediated tutoring sessions; the usage of hinting and of analogies on the part of the tutor; taking initiative on the part of the students; and several domain-based teaching techniques, for example, at which level of knowledge to teach. All of these strategies were implemented, and several were evaluated in careful experiments. CIRCSIM-Tutor was shown to engender significant learning gains, and was used in actual classes, which is even more striking since the NLP technologies available at the time were severely limited. For further details, please see Di Eugenio et al. 3 ]