Acknowledgments

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This project is a part of DoCTA-NSS, a project funded by ITU (IT in Education) program of KUF (Norwegian Ministry of Church Affairs, Education, and Research). The authors would also like to thank the anonymous reviewers for their constructive comments and all the participants, especially Jon Dolonen, Steinar Dragsnes, Rune Baggetun and Anders M rch, in the pedagogical agent group in DoCTA-NSS.

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