Leelawong, K. ., Davis, J. ., Vye, N. ., Biswas, G. ., Schwartz, D. ., Belynne, T. ., … Bransford, J. . (2002). The effects of feedback in supporting learning by teaching in a teachable agent environment. Keeping Learning Complex: The Proceedings of the Fifth International Conference of the Learning Sciences. Mahwah, NJ: Erlbaum. (Original work published 2002)