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K
Kortenkamp, U. H., & Richter-Gebert J. (1998).  Geometry and education in the Internet age. (Ottmann, T., & Tomek I., Ed.).Ed-Media & Ed-Telecom 98. Proceedings of the Tenth World Conference on Educational Multimedia and Hypermedia & World Conference on Educational Telecommunications, Freiburg, Germany, June 20-25, 1998. PDF icon KortenkampRichter-Ge-GEI-1998a.pdf (417.82 KB)
Kortenkamp, U. (1997).  Every simplicial polytope with at most d+4 vertices is a quotient of a neighborly polytope. Discrete & Computational Geometry. 18, 455–462.
Kortenkamp, U., & Fest A. (2008).  From CAS/DGS Integration to Algorithms in Educational Math Software. Proceedings of ATCM 08.
Kortenkamp, U., & Richter-Gebert J. (2000).  Decision complexity in Dynamic Geometry. (Wang, D., Ed.).Proceedings of ADG 2000. 3, 216–220.PDF icon KortenkampRichter-Ge-DCDG-2000.pdf (40.01 KB)
Kortenkamp, U. (2008).  Math Unit Testing – A New Approach to the Use of Technology in Teaching. (Laborde, C., Ed.).
Kortenkamp, U. (2002).  Kegelschnitte und Projektive Geometrie. mathematik lehren. 112, 16–20.
Kortenkamp, U., Blessing A. M., Dohrmann C., Kreis Y., Libbrecht P., & Mercat C. (2009).  Interoperable Interactive Geometry For Europe – First Technological and Educational Results and Future Challenges of the Intergeo Project. Proceedings of the Sixth Congress of the European Society for Research in Mathematics Education. January 28th - February 1st 2009, Lyon (France).
Kortenkamp, U. (2007).  Punkt- und Achsenspiegelungen mit DGS. (Beckmann, A., Ed.).Lernen mit Dynamischen Geometriesystemen. 3, 5-28.
Kortenkamp, U. (2009).  Lernbausteine Zahlenmauern.
Kuzle, A. (Submitted).  Nature of metacognition in a dynamic geometry environment. LUMAT – Research and Practice in Math, Science and Technology Education.
Kuzle, A. (2013).  Patterns of metacognitive behavior during mathematics problem-solving in a dynamic geometry environment. International Electronic Journal of Mathematics Education. 8(1), 20–40.
Kuzle, A. (2011).  Preservice teachers’ patterns of metacognitive behavior during mathematics problem solving in a dynamic geometry environment.
Kuzle, A., Pavlekovic M., Kolar-Begovic Z.., & Kolar-Super R.. (2013).  The interrelations of the cognitive, and metacognitive factors with the affective factors during problem solving. Mathematics teaching for the future . 250–260.
Kuzle, A., & Dohrmann C. (2014).  Unpacking Children's Angle "Grundvorstellungen”: The Case of Distance “Grundvorstellung” of 1° Angle. (Liljedahl, P., & Sinclare N., Ed.).PME 38. PDF icon RR_Kuzle-Dohrmann-submitted.pdf (683.57 KB)
Kuzle, A. (2012).  Preservice teachers’ patterns of metacognitive behavior during mathematics problem solving in a dynamic geometry environment. (Ludwig, M., & Kleine M., Ed.).46. Jahrestagung der Gesellschaft für Didaktik der Mathematik. 2, 513–516.
Kuzle, A. (Submitted).  Problem solving as an instructional method: The case of strategy-open problem “The treasure island problem”. LUMAT – Research and Practice in Math, Science and Technology Education.
Kuzle, A., & Artigue M. (2012).  Characterization of preservice teachers’ patterns of metacognitive behavior and the use of Geometer’s Sketchpad. The didactics of mathematics: Approaches and issues. A Hommage to Michèle Artigue.
Kuzle, A. (Submitted).  Unpacking the nature of problem solving processes in a dynamic geometry environment: Different technological effects. Journal für Mathematik-Didaktik.
Kuzle, A. (2012).  Investigating and communicating technology mathematics problem solving experience of two preservice teachers. Acta Didactica Napocensia. 5(1), 1–10.
L
Ladel, S., & Kortenkamp U. (2011).  An activity-theoretic approach to multi-touch tools in early maths learning. Proceedings of ATATEMLO 2011 in Paris. PDF icon LadelKortenkamp-AAMTEML-2011a.pdf (762.62 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)
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. (2012).  Early maths with multi-touch – an activity-theoretic approach. Proceedings of POEM 2012. PDF icon LadelKortenkamp-EMWMAA-2012a.pdf (1.91 MB)
Ladel, S., & Kortenkamp U. (Submitted).  Number concepts –- processes of internalization and externalization by the use of multi-touch technology Silke Ladel and Ulrich Kortenkamp. Early Mathematics Learning.
Ladel, S., & Kortenkamp U. (2011).  Finger-Symbol-Sets and Multi-Touch for a better understanding of numbers and operations. Proceedings of CERME 7, Rzeszow. PDF icon LadelKortenkamp-FMBUNO-2011a.pdf (598.13 KB)

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