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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)
Ladel, S., & Kortenkamp U. (2009).  Realisations of MERS (Multiple Extern Representations) and MELRS (Multiple Equivalent Linked Representations) in Elementary Mathematics Software. (Durand-Guerrier, V., Soury-Lavergne S., & Arzarello F., Ed.).Proceedings of the Sixth Congress of the European Society for Research in Mathematics Education. January 28th - February 1st 2009, Lyon (France). PDF icon LadelKortenkamp-RMMERMMELREMS-2009a.pdf (355.73 KB)
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