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Ladel, S., & Kortenkamp U. (2013).  An activity-theoretic approach to multi-touch tools in early maths learning. The International Journal for Technology in Mathematics Education. 20, PDF icon LadelKortenkamp-ATATEMLO-ICME-2013.pdf (426.48 KB)
Ladel, S., & Kortenkamp U. (2013).  Designing a technology based learning environment for place value using artifact-centric activity theory. (Lindmeier, A. M., & Heinze A., Ed.).Proceedings of the 37th conference of the International Group for the Psychology of Mathematics Education. Mathematics learning across the life span. 1, 188-192.PDF icon LadelKortenkamp-DTBLE-RF4pme37-2013.pdf (81.92 KB)
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