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Doering, A., Miller, C., Scharber, C. & Veletsianos, G. (2009). Designing with and for Technological Pedagogical Content Knowledge: The Evolution of GeoThentic. In T. Bastiaens, J. Dron & C. Xin (Eds.), Proceedings of E-Learn 2009--World Conference on E-Learning in Corporate, Government, Healthcare, and Higher Education (pp. 221-228). Vancouver, Canada: Association for the Advancement of Computing in Education (AACE).