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Kuzle, A.  (Submitted).\'a0\'a0Nature of metacognition in a dynamic geometry environment.  \ul LUMAT ? Research and Practice in Math, Science and Technology Education. \ul0  \par \par Ladel, S., & Kortenkamp U.  (Submitted).\'a0\'a0Number concepts ?- processes of internalization and externalization by the use of multi-touch technology Silke Ladel and Ulrich Kortenkamp.  \ul Early Mathematics Learning. \ul0  \par \par Kuzle, A.  (Submitted).\'a0\'a0Problem solving as an instructional method: The case of strategy-open problem ?The treasure island problem?.  \ul LUMAT ? Research and Practice in Math, Science and Technology Education. \ul0  \par \par Kuzle, A.  (Submitted).\'a0\'a0Unpacking the nature of problem solving processes in a dynamic geometry environment: Different technological effects.  \ul Journal f\'fcr Mathematik-Didaktik. \ul0  \par \par El-Demerdash, M., & Kortenkamp U.  (In Press).\'a0\'a0The Development of an Instrument to Measure Geometric Creativity.  \ul \ul0  \par \par Trgalov\'e1, J., El-Demerdash M., Labs O., & Nicaud J-F.  (2016).\'a0\'a0Collaborative Design of Educational Digital Resources for Promoting Creative Mathematical Thinking.  \ul 13th International Congress on Mathematical Education. \ul0  \par \par El-Demerdash, M., Filho P. Lealdino, & Mercat C.  (2016).\'a0\'a0Kinesthetic Promotion of Function Graph Recognition at University Level.  \ul Oral Communication at 13th International Congress of Mathematics Education. \ul0  \par \par Dohrmann, C.  (2016).\'a0\'a0Touch2Learn: Multi-Touch Lernumgebungen explorativ erforschen.  \ul Mediales Lernen ? Beispiele f\'fcr eine inklusive Mediendidaktik. \ul0  95-104.\par \par Dohrmann, C., & Kuzle A.  (2015).\'a0\'a0Winkel in der Sekundarstufe I ? Sch\'fclervorstellungen erforschen.  (Filler, A., & Lambert A., Ed.).\ul Geometrie zwischen Grundbegriffen und Grundvorstellungen. \ul0  29-42.\par \par Dohrmann, C., Kuzle A., Roth J., & Ames J..  (2014).\'a0\'a0Begriffsbildung zum Winkel in der Sek I: Auf der Suche nach Grundvorstellungen.  \ul 48. Jahrestagung der Gesellschaft f\'fcr Didaktik der Mathematik. \ul0  301-304.\par \par [Gast]  (2014).\'a0\'a0Early Mathematics Learning.  (Kortenkamp, U., Brandt B., Benz C., Krummheuer G., Ladel S., & Vogel R., Ed.).\ul \ul0  \par \par Biehler, R., Kuzle A., Dutkowski W., Elschenbroich H-J., & Heintz G.  (2014).\'a0\'a0GeKoDyn: Eine Fortbildungsreihe zur dynamischen und kompetenzorientierten Sicht auf die euklidische Geometrie.  (Roth, J., & Ames J.., Ed.).\ul 48. Jahrestagung der Gesellschaft f\'fcr Didaktik der Mathematik. \ul0  181?184.\par \par Biehler, R., Dutkowski W., Elschenbroich H-J., Heintz G., Hollendung K., & Kuzle A.  (2014).\'a0\'a0Geometrie lehren und lernen ? kompetenzorientiert und dynamisc.  \ul Meidenbrief Mathematik. \ul0  29?30.\par \par Etzold, H., & Petzschler I.  (2014).\'a0\'a0Mathe verstehen durch Papierfalten ?  Anleitungen und Arbeitsbl\'e4tter f\'fcr die Sekundarstufe .  \ul \ul0  112.\par \par Kuzle, A., & Dohrmann C.  (2014).\'a0\'a0Unpacking Children's Angle "Grundvorstellungen?: The Case of Distance ?Grundvorstellung? of 1\'b0 Angle.  (Liljedahl, P., & Sinclare N., Ed.).\ul PME 38. \ul0  \par \par Ladel, S., & Kortenkamp U.  (2013).\'a0\'a0An activity-theoretic approach to multi-touch tools in early maths learning.  \ul The International Journal for Technology in Mathematics Education. 20,\ul0  \par \par Dohrmann, C., & Kuzle A.  (2013).\'a0\'a0Begriffsbildung im Mathematikunterricht der Sek I zum Thema Winkel.  \ul Tagung des GDM-Arbeitskreises Geometrie 2012. \ul0  \par \par Ladel, S., & Kortenkamp U.  (2013).\'a0\'a0Designing a technology based learning environment for place value using artifact-centric activity theory.  (Lindmeier, A. M., & Heinze A., Ed.).\ul Proceedings of the 37th conference of the International Group for the Psychology of Mathematics Education. Mathematics learning across the life span. 1,\ul0  188-192.\par \par Kistener, S., Burns B., Vollmeyer R., & Kortenkamp U.  (2013).\'a0\'a0An Explorative Study of Search of Model Space in Problem Solving.  \ul \ul0  \par \par Kistener, S., Burns B., Vollmeyer R., & Kortenkamp U.  (2013).\'a0\'a0An Explorative Study of Search of Model Space in Problem Solving.  \ul \ul0  \par \par Hoffkamp, A., Kortenkamp U., & Seidel S.  (2013).\'a0\'a0Handreichung zur Situation mathematischer Vorkurse an sachsen-anhaltischen Hochschulen und Vorschl\'e4ge zu deren didaktisch-methodischer Ausgestaltung.  \ul \ul0  \par \par Kuzle, A., Pavlekovic M., Kolar-Begovic Z.., & Kolar-Super R..  (2013).\'a0\'a0The interrelations of the cognitive, and metacognitive factors with the affective factors during problem solving.  \ul Mathematics teaching for the future . \ul0  250?260.\par \par Kortenkamp, U.  (2013).\'a0\'a0Madipedia ? Das Wiki f\'fcr die Mathematikdidaktik.  (Fleckenstein, S., Ed.).\ul Georg-Cantor-Zeitschrift. 15,\ul0  25-39.\par \par Dohrmann, C., & Kuzle A.  (2013).\'a0\'a0Past-Present-Future: Winkel anschaulich unterrichten!.  \ul 47. Jahrestagung der Gesellschaft f\'fcr Didaktik der Mathematik. \ul0  \par \par Kuzle, A.  (2013).\'a0\'a0Patterns of metacognitive behavior during mathematics problem-solving in a dynamic geometry environment.  \ul International Electronic Journal of Mathematics Education. 8\ul0 (1),\'a020?40.\par \par Libbrecht, P., & Kortenkamp U.  (2013).\'a0\'a0The Role of Metadata in the Design of Educational Activities.  \ul Proceedings of CERME 8, Antalya. \ul0  \par \par Kortenkamp, U., Winter C., & Z\'f6llner J.  (2013).\'a0\'a0Stein f\'fcr Stein: Mauern bauen ? Strukturen erkennen.  \ul Grundschulunterricht. \ul0  \par \par Libbrecht, P., Kortenkamp U., Rebholz S., & M\'fcller W.  (2013).\'a0\'a0Tales of a Companion Teacher Analytics.  (Vatrapu, R., Ed.).\ul Proceedings of the 2nd International Workshop on Teaching Analytics (IWTA-2013). \ul0  \par \par Kuzle, A., & Artigue M.  (2012).\'a0\'a0Characterization of preservice teachers? patterns of metacognitive behavior and the use of Geometer?s Sketchpad.  \ul The didactics of mathematics: Approaches and issues. A Hommage to Mich\'e8le Artigue. \ul0  \par \par Richter-Gebert, J., & Kortenkamp U. H.  (2012).\'a0\'a0The Cinderella.2 Manual ? Working with the Interactive Geometry Software.  \ul \ul0  \par \par Ladel, S., & Kortenkamp U.  (2012).\'a0\'a0Early maths with multi-touch ? an activity-theoretic approach.  \ul Proceedings of POEM 2012. \ul0  \par \par Bescherer, C., Herding D., Kortenkamp U., M\'fcller W., & Zimmermann M.  (2012).\'a0\'a0E-learning Tools with Intelligent Assessment and Feedback.  (Graf, S., Lin F., Kinshuk, & McGreal R., Ed.).\ul Intelligent and Adaptive Learning Systems: Technology Enhanced Support for Learners and Teachers. \ul0  \par \par Kortenkamp, U.  (2012).\'a0\'a0Interaktives Whiteboard, iPad & Co. ? das Klassenzimmer der Zukunft.  \ul \ul0  \par \par Kuzle, A.  (2012).\'a0\'a0Investigating and communicating technology mathematics problem solving experience of two preservice teachers.  \ul Acta Didactica Napocensia. 5\ul0 (1),\'a01?10.\par \par Kistner, S., Burns B., Kortenkamp U., & Vollmeyer R.  (2012).\'a0\'a0Learning with an interactive physics programme.  \ul \ul0  \par \par Kuzle, A.  (2012).\'a0\'a0Preservice teachers? patterns of metacognitive behavior during mathematics problem solving in a dynamic geometry environment.  (Ludwig, M., & Kleine M., Ed.).\ul 46. Jahrestagung der Gesellschaft f\'fcr Didaktik der Mathematik. 2,\ul0  513?516.\par \par Ladel, S., & Kortenkamp U.  (2011).\'a0\'a0An activity-theoretic approach to multi-touch tools in early maths learning.  \ul Proceedings of ATATEMLO 2011 in Paris. \ul0  \par \par [Gast]  (2011).\'a0\'a0Computerwerkzeuge und Pr\'fcfungen / Aufgaben mit Technologieeinsatz im Mathematikunterricht. Bericht \'fcber die 24. und 25. Arbeitstagung des Arbeitskreises Mathematikunterricht und Informatik.  (Kortenkamp, U., Lambert A., & Zeimetz A., Ed.).\ul \ul0  \par \par Kortenkamp, U.  (2011).\'a0\'a0Die etwas andere Vorlesung: AnOrMaL.  (Krohn, T., Malitte E., Richter G., Richter K., Sch\'f6neburg S., & Sommer R., Ed.).\ul Mathematik f\'fcr alle - Wege zum \'d6ffnen von Mathematik. Mathematikdidaktische Ans\'e4tze. Festschrift f\'fcr Wilfried Herget. \ul0  \par \par Ladel, S., & Kortenkamp U.  (2011).\'a0\'a0Finger-Symbol-Sets and Multi-Touch for a better understanding of numbers and operations.  \ul Proceedings of CERME 7, Rzeszow. \ul0  \par \par Trgalova, J., Kortenkamp U., Jahn A P., Libbrecht P., Mercat C., Recio T., et al.  (2011).\'a0\'a0I2Geo.net ? a platform for sharing dynamic geometry resources all over Europe.  \ul \ul0  \par \par Ladel, S., & Kortenkamp U.  (2011).\'a0\'a0Implementation of a multi-touch-environment supporting finger symbol sets.  \ul Proceedings of CERME 7, Rzeszow. \ul0  \par \par Kortenkamp, U.  (2011).\'a0\'a0Interoperable Interactive Geometry for Europe.  \ul The Electronic Journal of Mathematics and Technology. 5,\ul0  \par \par Kortenkamp, U.  (2011).\'a0\'a0Interoperable Interactive Geometry for Europe.  \ul The Electronic Journal of Mathematics and Technology. 5,\ul0  \par \par Kortenkamp, U., & Laborde C.  (2011).\'a0\'a0Interoperable Interactive Geometry for Europe: an introduction.  \ul ZDM ? The International Journal on Mathematics Education. \ul0  1-3.\par \par Kuzle, A.  (2011).\'a0\'a0Preservice teachers? patterns of metacognitive behavior during mathematics problem solving in a dynamic geometry environment.  \ul \ul0  \par \par Kortenkamp, U., & Blessing A. M.  (2011).\'a0\'a0VideoClipQuests as an E-Learning Pattern.  (Kohls, C., & Wedekind J., Ed.).\ul Investigations on E-Learning Patterns: Context Factors, Problems, and Solutions. \ul0  237-248.\par \par Kortenkamp, U., & Dohrmann C.  (2011).\'a0\'a0???''??????????????.  \ul ????. \ul0  \par \par Libbrecht, P., Kortenkamp U., & Mercat C.  (2010).\'a0\'a0Crossing Cultural Boundaries with Long Term Interactive Geometry Resources.  \ul \ul0  \par \par El-Demerdash, M.  (2010).\'a0\'a0The Effectiveness of an Enrichment Program Using Dynamic Geometry Software in Developing Mathematically Gifted Students' Geometric Creativity in High Schools.  \ul Universit\'e4t Schw\'e4bisch-Gm\'fcnd. Ph.D.,\ul0  523.\par \par Kortenkamp, U., & Kreis Y.  (2010).\'a0\'a0Konstruktionsbeschreibungen und DGS.  \ul Beitr\'e4ge zum Mathematikunterricht. Vortr\'e4ge auf der 44. Tagung f\'fcr Didaktik der Mathematik in M\'fcnchen. \ul0  501-504.\par \par M\'fcller, W., & Kortenkamp U.  (2010).\'a0\'a0Learning Programming with Ruby.  \ul Proceedings of the IFIP Workshop "New developments in ICT and Informatics education''. \ul0  \par \par Richter-Gebert, J., & Kortenkamp U.  (2010).\'a0\'a0The power of scripting: DGS meets programming.  \ul Acta Didactica Napocensia. 3,\ul0  67-78.\par \par Kortenkamp, U., Bescherer C., & Spannagel C.  (2010).\'a0\'a0Schnittstellenaktivit\'e4t Hochschul-Mathematikdidaktik.  \ul Beitr\'e4ge zum Mathematikunterricht. Vortr\'e4ge auf der 44. Tagung f\'fcr Didaktik der Mathematik in M\'fcnchen. \ul0  61-68.\par \par Etzold, H., & Petzschler I.  (2010).\'a0\'a0Spiele zur Unterrichtsgestaltung. Mathematik.  \ul \ul0  120.\par \par Kortenkamp, U., & Dohrmann C.  (2010).\'a0\'a0User Interface Design for Dynamic Geometry Software.  \ul Proceedings of CADGME 2009. 3,\ul0  59-66.\par \par Blessing, A. M., & Kortenkamp U.  (2010).\'a0\'a0VideoClipQuests as a New Setup For Learning.  (Spector, M. J., Ifenthaler D., Isa\'edas P., Kinshuk, & Sampson D. G., Ed.).\ul Learning and Instruction in the Digital Age: Making a Difference through Cognitive Approaches, Technology-facilitated Collaboration and Assessment, and Personalized Communications. \ul0  \par \par Kortenkamp, U., & Richter-Gebert J.  (2009).\'a0\'a0Blended Experimentation with DGS.  \ul Proceedings of CADGME 2009. \ul0  \par \par Spannagel, C., & Kortenkamp U.  (2009).\'a0\'a0Demonstrating, Guiding, and Analyzing Processes in Dynamic Geometry Systems.  (Bardini, C., Fortin C., Oldknow A., & Vagost D., Ed.).\ul Proceedings of the 9th International Conference on Technology in Mathematics Teaching. \ul0  \par \par Kortenkamp, U., & Rolka K.  (2009).\'a0\'a0"Der Boxplot ist nur von einzelnen Werten abh\'e4ngig" ? Dateninterpretation durch Computereinsatz schulen.  \ul Beitr\'e4ge zum Mathematikunterricht. Vortr\'e4ge auf der 43. Tagung f\'fcr Didaktik der Mathematik in Oldenburg. \ul0  \par \par Hoffkamp, A.  (2009).\'a0\'a0Dynamisierter Repr\'e4sentationstransfer und Metavariation - Ein Ansatz zur F\'f6rderung funktionalen Denkens durch Computereinsatz.  \ul Beitr\'e4ge zum Mathematikunterricht 2009. \ul0  \par \par El-Demerdash, M., & Kortenkamp U.  (2009).\'a0\'a0The Effectiveness of an Enrichment Program Using Dynamic Geometry Software in Developing Mathematically Gifted Students' Geometric Creativity.  (Bardini, C., Fortin C., Oldknow A., & Vagost D., Ed.).\ul Proceedings of the 9th International Conference on Technology in Mathematics Teaching. \ul0  \par \par Hoffkamp, A.  (2009).\'a0\'a0Enhancing Functional Thinking Using the Computer for Representational Transfer.  \ul Proceedings of CERME 6. \ul0  \par \par Hoffkamp, A.  (2009).\'a0\'a0Funktionales Denken mit dem Computer unterst\'fctzen - Empirische Untersuchungen im Rahmen des prop\'e4deutischen Unterrichts der Analysis.  \ul 27. Arbeitstagung des Arbeitskreises "Mathematikunterricht und Informatik" in der GDM. \ul0  \par \par Hoffkamp, A.  (2009).\'a0\'a0Funktionales Denken und Analysisprop\'e4deutik - Ein Beitrag zu einem qualitativen Einstieg in die Schulanalysis durch Computereinsatz.  \ul \ul0  \par \par Kortenkamp, U.  (2009).\'a0\'a0Homogene Koordinaten.  \ul mathematik lehren. 154,\ul0  \par \par Ab\'e1nades, M., Botana F., Escribano J., Hendriks M., Kortenkamp U., Kreis Y., et al.  (2009).\'a0\'a0The Intergeo File Format in Progress.  \ul Proceedings of the 22nd OpenMath Meeting. \ul0  \par \par Ab\'e1nades, M., Botana F., Escribano J., Hendriks M., Kortenkamp U., Kreis Y., et al.  (2009).\'a0\'a0The Intergeo File Format in Progress.  \ul Proceedings of the 22nd OpenMath Meeting. \ul0  \par \par Libbrecht, P., Kortenkamp U., & Mercat C.  (2009).\'a0\'a0I2Geo: a Web-Library of Interactive Geometry.  (Sojka, P., Ed.).\ul Proceedings of the 2nd Workshop Towards a Digital Mathematics Library (DML-2009). \ul0  \par \par Kortenkamp, U., Blessing A. M., Dohrmann C., Kreis Y., Libbrecht P., & Mercat C.  (2009).\'a0\'a0Interoperable Interactive Geometry For Europe ? First Technological and Educational Results and Future Challenges of the Intergeo Project.  \ul Proceedings of the Sixth Congress of the European Society for Research in Mathematics Education. January 28th - February 1st 2009, Lyon (France). \ul0  \par \par Kortenkamp, U., Blessing A. M., Dohrmann C., Kreis Y., Libbrecht P., & Mercat C.  (2009).\'a0\'a0Interoperable Interactive Geometry For Europe ? First Technological and Educational Results and Future Challenges of the Intergeo Project.  \ul Proceedings of the Sixth Congress of the European Society for Research in Mathematics Education. January 28th - February 1st 2009, Lyon (France). \ul0  \par \par Kortenkamp, U.  (2009).\'a0\'a0Lernbausteine Klammergebirge.  \ul \ul0  \par \par Kortenkamp, U.  (2009).\'a0\'a0Lernbausteine Zahlenmauern.  \ul \ul0  \par \par Kortenkamp, U., Modrow E., Oldenburg R., Poloczek J., & Rabel M.  (2009).\'a0\'a0Objektorientierte Modellierung ? aber wann und wie?.  \ul LOG-IN. \ul0  22-28.\par \par Fest, A., & Kortenkamp U.  (2009).\'a0\'a0Process Orientated Learning Environments For Interactive Geometry Lessons.  (Bardini, C., Fortin C., Oldknow A., & Vagost D., Ed.).\ul Proceedings of the 9th International Conference on Technology in Mathematics Teachingh International Conference on Technology in Mathematics Teaching. \ul0  \par \par Ladel, S., & Kortenkamp U.  (2009).\'a0\'a0Realisations of MERS (Multiple Extern Representations) and MELRS (Multiple Equivalent Linked Representations) in Elementary Mathematics Software.  (Durand-Guerrier, V., Soury-Lavergne S., & Arzarello F., Ed.).\ul Proceedings of the Sixth Congress of the European Society for Research in Mathematics Education. January 28th - February 1st 2009, Lyon (France). \ul0  \par \par Fest, A., & Kortenkamp U.  (2009).\'a0\'a0Teaching Graph Algorithms with Visage.  \ul Teaching Mathematics and Computer Science. 7,\ul0  35-50.\par \par Kortenkamp, U., & Rolka K.  (2009).\'a0\'a0Using Technology in the Teaching and Learning of Box Plots.  (Durand-Guerrier, V., Soury-Lavergne S., & Arzarello F., Ed.).\ul Proceedings of the Sixth Congress of the European Society for Research in Mathematics Education. January 28th - February 1st 2009, Lyon (France). \ul0  \par \par Kortenkamp, U., Dohrmann C., Kreis Y., & Dording C.  (2009).\'a0\'a0Using the Intergeo Platform for Teaching and Research.  (Bardini, C., Fortin C., Oldknow A., & Vagost D., Ed.).\ul Proceedings of the 9th International Conference on Technology in Mathematics Teaching. \ul0  \par \par Kortenkamp, U., Dohrmann C., Kreis Y., & Dording C.  (2009).\'a0\'a0Using the Intergeo Platform for Teaching and Research.  (Bardini, C., Fortin C., Oldknow A., & Vagost D., Ed.).\ul Proceedings of the 9th International Conference on Technology in Mathematics Teaching. \ul0  \par \par Blessing, A., & Kortenkamp U.  (2009).\'a0\'a0VideoClipQuests as an E-Learning Pattern.  \ul Proceedings of the E-Learning Patterns Workshop 2009. \ul0  \par \par Ladel, S., & Kortenkamp U.  (2009).\'a0\'a0Virtuell-enaktives Arbeiten mit der ?Kraft der F\'fcnf''.  \ul MNUprimar. \ul0  \par \par Kortenkamp, U.  (2008).\'a0\'a0Algorithmen im Mathematikunterricht.  (Kortenkamp, U., Weigand H-G., & Weth T., Ed.).\ul Informatische Ideen im Mathematikunterricht. Bericht \'fcber die 23. Arbeitstagung des Arbeitskreises Mathematikunterricht und Informatik. \ul0  77?86.\par \par Richter-Gebert, J., & Kortenkamp U.  (2008).\'a0\'a0Cinderella ? Online-Experimente der Geometrie und Physik.  (Greuel, G-M., Ed.).\ul \ul0  \par \par Kortenkamp, U., & Richter-Gebert J.  (2008).\'a0\'a0Cinderella.2 ? Geometrie und Physik im Dialog.  \ul Computeralgebra-Rundbrief. \ul0  \par \par Blessing, A. M., & Kortenkamp U.  (2008).\'a0\'a0Der Einsatz von VideoClipQuests in Moodle.  \ul Vortr\'e4ge auf der 5. Internationalen Moodle Konferenz 2008 in Klagenfurt. \ul0  \par \par Kortenkamp, U., & Fest A.  (2008).\'a0\'a0From CAS/DGS Integration to Algorithms in Educational Math Software.  \ul Proceedings of ATCM 08. \ul0  \par \par [Gast]  (2008).\'a0\'a0Informatische Ideen im Mathematikunterricht. Bericht \'fcber die 23. Arbeitstagung des Arbeitskreises Mathematikunterricht und Informatik.  (Kortenkamp, U., Weigand H-G., & Weth T., Ed.).\ul \ul0  \par \par Kortenkamp, U., & Kreis Y.  (2008).\'a0\'a0Intergeo ? Interoperable Interactive Geometry for Europe.  \ul Beitr\'e4ge zum Mathematikunterricht. Vortr\'e4ge auf der 42. Tagung f\'fcr Didaktik der Mathematik in Budapest. \ul0  \par \par Kortenkamp, U., & Kreis Y.  (2008).\'a0\'a0Intergeo ? Interoperable Interactive Geometry for Europe.  \ul Beitr\'e4ge zum Mathematikunterricht. Vortr\'e4ge auf der 42. Tagung f\'fcr Didaktik der Mathematik in Budapest. \ul0  \par \par Kortenkamp, U.  (2008).\'a0\'a0Math Unit Testing ? A New Approach to the Use of Technology in Teaching.  (Laborde, C., Ed.).\ul \ul0  \par \par Kortenkamp, U.  (2008).\'a0\'a0A Technology Based Approach to Discrete Mathematics in the Classroom.  (Campbell, S., & Grenier D., Ed.).\ul Proceedings of ICME-11, TSG 15. \ul0  \par \par Blessing, A., & Kortenkamp U.  (2008).\'a0\'a0VideoClipQuests as a New Setup For Learning.  (Kinshuk, Sampson D. G., Spector M. J., Isa\'edas P., & Ifenthaler D., Ed.).\ul Proceedings of the IADIS International Conference on Cognition and Exploratory Learning in Digital Age (CELDA 2008). \ul0  343?346.\par \par Kortenkamp, U., & M\'fcller W.  (2008).\'a0\'a0Wo ist denn hier das Undo?.  \ul Online Tutoring Journal. 3,\ul0  \par \par Richter-Gebert, J., & Kortenkamp U.  (2008).\'a0\'a0Zusammenspiel: Mathematik und Architektur.  (Behrends, E., Gritzmann P., & Ziegler G. M., Ed.).\ul ? und Co.. \ul0  342?349.\par \par Kortenkamp, U.  (2007).\'a0\'a0CAS und DGS im Dialog ? oder: Wieviel CAS braucht der Mensch?.  \ul Beitr\'e4ge zum Mathematikunterricht. Vortr\'e4ge auf der 41. Tagung f\'fcr Didaktik der Mathematik in Berlin. \ul0  \par \par Spannagel, C., & Kortenkamp U.  (2007).\'a0\'a0CleverPHL ? ein Werkzeug zum flexiblen Umgang mit Konstruktionsprozessen in DGS.  \ul Beitr\'e4ge zum Mathematikunterricht. Vortr\'e4ge auf der 41. Tagung f\'fcr Didaktik der Mathematik in Berlin. \ul0  \par \par Kortenkamp, U.  (2007).\'a0\'a0Combining CAS and DGS ? Towards Algorithmic Thinking.  (Li, S., Wang D., & Zhang J-Z., Ed.).\ul Symbolic Computation and Education. \ul0  150-173.\par \par Kortenkamp, U.  (2007).\'a0\'a0Guidelines for Using Computers Creatively in Mathematics Education.  (Ko, K H., & Arganbright D., Ed.).\ul Enhancing University Mathematics: Proceedings of the First KAIST International Symposium on Teaching. 14,\ul0  129?138.\par \par Spannagel, C., & Kortenkamp U.  (2007).\'a0\'a0Prozesse beim Lernen mit DGS: Aufzeichnung, Wiedergabe, Analyse.  (Ludwig, M., Ed.).\ul Tagungsband des Arbeitskreis Geometrie der GDM. \ul0  \par \par Kortenkamp, U.  (2007).\'a0\'a0Punkt- und Achsenspiegelungen mit DGS.  (Beckmann, A., Ed.).\ul Lernen mit Dynamischen Geometriesystemen. 3,\ul0  5-28.\par \par Fest, A., & Kortenkamp U.  (2007).\'a0\'a0Teaching Graph Algorithms with Visage.  (S\'e1rv\'e1ri, C., & Lavicza Z., Ed.).\ul Proceedings of CADGME 2007 in P\'e9cs. \ul0  \par \par Kortenkamp, U.  (2007).\'a0\'a0Zur Reaktivierung der Geometrie in der Schule.  \ul Beitr\'e4ge zum Mathematikunterricht. Vortr\'e4ge auf der 41. Tagung f\'fcr Didaktik der Mathematik. \ul0  \par \par Kortenkamp, U.  (2006).\'a0\'a0Algorithmische Geometrie im Unterricht.  \ul Der Mathematikunterricht. 52,\ul0  32-39.\par \par M\'fcller, W., Bescherer C., Kortenkamp U., & Spannagel C.  (2006).\'a0\'a0Intelligent Computer-aided Assessment in the Math Classroom: State-of-the-art and Perspectives.  \ul Proceedings of the IFIP WG 3.1, 3.3, & 3.5 Joint Conference Imagining the future for ICT and Education, Alesund, Norway. \ul0  \par \par Kortenkamp, U.  (2006).\'a0\'a0Punkt- und Achsenspiegelungen.  \ul \ul0  \par \par Kortenkamp, U.  (2006).\'a0\'a0Paving the Alexanderplatz Efficiently with a quasi-periodic tiling.  (Duvernoy, S., & Pedemonte O., Ed.).\ul Nexus VI: Architecture and Mathematics. \ul0  57-62.\par \par Kortenkamp, U.  (2006).\'a0\'a0Terme erklimmen. Klammergebirge als Strukturierungshilfe.  \ul mathematik lehren. 136,\ul0  13.\par \par Kortenkamp, U.  (2005).\'a0\'a0Dokumentation, Diskussion und Protokolle: Wie kommuniziert man Geometrie im Internetzeitalter?.  (Engel, J., Vogel R., & Wessolowski S., Ed.).\ul Strukturieren ? Modellieren ? Kommunizieren. Leitbilder mathematischer und informatischer Aktivit\'e4ten. \ul0  141-150.\par \par Kortenkamp, U.  (2005).\'a0\'a0Experimentieren und Publizieren.  (Bender, P., Herget W., Weigand H-G., & Weth T., Ed.).\ul WWW und Mathematik - Lehren und Lernen im Internet, Tagungsband der 21. Arbeitstagung des Arbeitskreis Mathematikunterricht und Informatik in Dillingen/Donau. \ul0  120-126.\par \par Kortenkamp, U.  (2005).\'a0\'a0Guidelines for Using Computers Creatively in Mathematics Education.  (Arganbright, D., Ed.).\ul Proceedings of the 1st KAIST Symposium on Enhancing University Mathematics Teaching. \ul0  \par \par Kortenkamp, U.  (2005).\'a0\'a0Klammergebirge als Strukturierungshilfe in der Algebra.  \ul Beitr\'e4ge zum Mathematikunterricht. Vortr\'e4ge auf der 39. Tagung f\'fcr Didaktik der Mathematik in Bielefeld. \ul0  \par \par Kortenkamp, U.  (2005).\'a0\'a0Visage ? Visualisierung von Graphenalgorithmen.  \ul Beitr\'e4ge zum Mathematikunterricht. Vortr\'e4ge auf der 39. Tagung f\'fcr Didaktik der Mathematik. \ul0  \par \par Geschke, A., Kortenkamp U., Lutz-Westphal B., & Materlik D.  (2005).\'a0\'a0Visage ? Visualization of Algorithms in Discrete Mathematics.  \ul Zentralblatt f\'fcr Didaktik der Mathematik. 37,\ul0  395-401.\par \par Brehm, E., & Kortenkamp U.  (2004).\'a0\'a0Advanced Teaching of Geometry with Interactive Tools.  (Nagaoka, R., Ishi H., & Hitzer E., Ed.).\ul Proceedings of RIMS-Workshop ITMga 2003. \ul0  \par \par Kortenkamp, U.  (2004).\'a0\'a0Experimental mathematics and proofs ? what is secure mathematical knowledge?.  \ul Zentralblatt f\'fcr Didaktik der Mathematik. 36,\ul0  61?66.\par \par Kortenkamp, U., & Materlik D.  (2004).\'a0\'a0Geometry teaching in wireless classroom environments using Java and J2ME.  \ul Science of Computer Programming. 53,\ul0  71?85.\par \par Kortenkamp, U.  (2004).\'a0\'a0Kommunizieren und Dokumentieren von Geometrie.  \ul Beitr\'e4ge zum Mathematikunterricht. Vortr\'e4ge auf der 38. Tagung f\'fcr Didaktik der Mathematik in Augsburg. \ul0  \par \par Kortenkamp, U., & Materlik D.  (2004).\'a0\'a0Pen-based input of geometric constructions.  (Libbrecht, P., Ed.).\ul Proceedings of MathUI 2004. \ul0  \par \par Kortenkamp, U., & Richter-Gebert J.  (2004).\'a0\'a0Using Automatic Theorem Proving to Improve the Usability of Geometry Software.  (Libbrecht, P., Ed.).\ul Proceedings of MathUI 2004. \ul0  \par \par Kortenkamp, U., & Materlik D.  (2004).\'a0\'a0Vernetztes Lehren und Lernen im Mathematikunterricht.  (Fellbaum, K., Rebensburg K., & Schwill A., Ed.).\ul Grundfragen multimedialen Lehrens und Lernens. Tagungsband des 2. Workshops GML2004. \ul0  \par \par Richter-Gebert, J., & Kortenkamp U.  (2004).\'a0\'a0Zusammenspiel: Mathematik und Architektur.  \ul aviso - Zeitschrift f\'fcr Wissenschaft und Kunst in Bayern. 1,\ul0  26?33.\par \par Kirstein, J., Nordmeier V., Rudolf R., Sabina J., & Ulrich K.  (2003).\'a0\'a0Empfehlungen zur Ausstattung von Fachraum-Medieninseln f\'fcr den mathematischen und naturwissenschaftlichen Unterricht.  \ul \ul0  \par \par Kortenkamp, U., & Weth T.  (2003).\'a0\'a0Syntaxfreie Konstruktionsbeschreibungen mit Cinderella.  \ul Beitr\'e4ge zum Mathematikunterricht. Vortr\'e4ge auf der 37. Tagung f\'fcr Didaktik der Mathematik in Dortmund. \ul0  \par \par Richter-Gebert, J., & Kortenkamp U. H.  (2003).\'a0\'a0?????. ??????????????.  \ul \ul0  \par \par Richter-Gebert, J., & Kortenkamp U. H.  (2002).\'a0\'a0Complexity issues in Dynamic Geometry.  (Cucker, F., & Rojas M. J., Ed.).\ul Foundations of Computational Mathematics (Proceedings of the Smale Fest 2000). \ul0  \par \par Richter-Gebert, J., & Kortenkamp U.  (2002).\'a0\'a0Dynamische Geometrie: Grundlagen und M\'f6glichkeiten.  (Weth, T., Ed.).\ul Tagungsband zum N\'fcrnberger Kolloquium zur Didaktik der Mathematik 2002. \ul0  369-372.\par \par Richter-Gebert, J., & Kortenkamp U.  (2002).\'a0\'a0Kalenderblatt Juni 2002.  \ul \ul0  \par \par Kortenkamp, U.  (2002).\'a0\'a0Kegelschnitte und Projektive Geometrie.  \ul mathematik lehren. 112,\ul0  16?20.\par \par Kortenkamp, U.  (2002).\'a0\'a0Making the move: The next version of Cinderella.  (Cohen, A. M., Gao X-S., & Takayama N., Ed.).\ul Proceedings of the First International Congress of Mathematical Software. \ul0  208?216.\par \par Richter-Gebert, J., & Kortenkamp U. H.  (2001).\'a0\'a0Cinderella ? Programa interactivo di Geometria.  \ul \ul0  \par \par Richter-Gebert, J., & Kortenkamp U. H.  (2001).\'a0\'a0Cinderella ? Software interattivo di geometria.  \ul \ul0  \par \par Kortenkamp, U., & Richter-Gebert J.  (2001).\'a0\'a0Decision complexity in Dynamic Geometry.  (Wang, D., Ed.).\ul Proceedings of ADG 2000. \ul0  167?172.\par \par Kortenkamp, U.  (2001).\'a0\'a0Die interaktive Geometrie-Software Cinderella.  (Beck, U., & Sommer W., Ed.).\ul Tagungsband Learntec 2001. 2,\ul0  525?532.\par \par Richter-Gebert, J., & Kortenkamp U.  (2001).\'a0\'a0A dynamic setup for elementary geometry.  \ul Proceedings of MTCM 2000. \ul0  \par \par Kortenkamp, U.  (2001).\'a0\'a0Dynamische Geometrie.  \ul Mitteilungen der DMV. 3,\ul0  33?40.\par \par Kortenkamp, U.  (2001).\'a0\'a0The future of mathematical software.  \ul Proceedings of MTCM 2000. \ul0  \par \par Richter-Gebert, J., & Kortenkamp U.  (2001).\'a0\'a0Grundlagen Dynamischer Geometrie.  (Henn, H-W., Elschenbroich H-J., & Gawlick T., Ed.).\ul Zeichnung ? Figur ? Zugfigur. \ul0  123?144.\par \par Richter-Gebert, J., & Kortenkamp U. H.  (2000).\'a0\'a0Cinderella ? die interaktive Geometriesoftware.  \ul Clever lernen ? super Noten!. \ul0  \par \par Richter-Gebert, J., & Kortenkamp U. H.  (2000).\'a0\'a0Cinderella ? Nachmittagssoftware im Unterricht?.  \ul Rundgang. 2,\ul0  \par \par Kortenkamp, U., & Richter-Gebert J.  (2000).\'a0\'a0Decision complexity in Dynamic Geometry.  (Wang, D., Ed.).\ul Proceedings of ADG 2000. 3,\ul0  216?220.\par \par Richter-Gebert, J., & Kortenkamp U. H.  (2000).\'a0\'a0Die interaktive Geometry-Software Cinderella.  \ul \ul0  \par \par Richter-Gebert, J., & Kortenkamp U.  (2000).\'a0\'a0Dynamic aspects in computational geometry.  (Montes, A., Ed.).\ul Proceedings of the EACA 2000. \ul0  51?61.\par \par Richter-Gebert, J., & Kortenkamp U.  (2000).\'a0\'a0Euklidische und nicht-Euklidische Geometrie in Cinderella.  \ul Journal f\'fcr Mathematikdidaktik. 22,\ul0  303?324.\par \par Kortenkamp, U.  (2000).\'a0\'a0Foundations of Dynamic Geometry.  \ul Journal f\'fcr Mathematikdidaktik. 21,\ul0  161?162.\par \par Kortenkamp, U.  (2000).\'a0\'a0Internetf\'e4hige Software f\'fcrs Lernen im 21.\'a0Jahrhundert.  \ul FU-Nachrichten. 6,\ul0  \par \par Kortenkamp, U.  (2000).\'a0\'a0Kontinuit\'e4t in Dynamischer Geometrie.  \ul Beitr\'e4ge zum Mathematikunterricht. Vortr\'e4ge auf der 35. Tagung f\'fcr Didaktik der Mathematik in Potsdam. \ul0  358?361.\par \par Kortenkamp, U. H., & Richter-Gebert J.  (1999).\'a0\'a0Das Cinderella-Projekt.  (Maffeis, S., Toenniessen F., & Zeidler C., Ed.).\ul Erfahrungen mit Java. \ul0  381?401.\par \par Richter-Gebert, J., & Kortenkamp U. H.  (1999).\'a0\'a0Dynamic Geometry I: The Problem of Continuity.  \ul Abstracts 15th European Workshop Comput. Geom.. \ul0  51?53.\par \par Kortenkamp, U. H., & Richter-Gebert J.  (1999).\'a0\'a0Dynamic Geometry II: Applications.  \ul Abstracts 15th European Workshop Comput. Geom.. \ul0  109?111.\par \par Kortenkamp, U. H., & Richter-Gebert J.  (1999).\'a0\'a0Euklidische und Nicht-Euklidische Geometrie mit Cinderella.  (Weth, T., Ed.).\ul Tagungsband zum N\'fcrnberger Kolloquium zur Didaktik der Mathematik 1999. \ul0  \par \par Kortenkamp, U.  (1999).\'a0\'a0Foundations of Dynamic Geometry.  \ul \ul0  \par \par Kortenkamp, U.  (1999).\'a0\'a0Geometrie lehren mit dem Internet.  \ul Interface. 2,\ul0  26?29.\par \par Richter-Gebert, J., & Kortenkamp U. H.  (1999).\'a0\'a0The Interactive Geometry Software Cinderella.  \ul \ul0  \par \par Kortenkamp, U. H., & Richter-Gebert J.  (1999).\'a0\'a0Shrink-Wrapped Java in Education.  \ul \ul0  \par \par Kortenkamp, U. H., & Richter-Gebert J.  (1998).\'a0\'a0Geometry and education in the Internet age.  (Ottmann, T., & Tomek I., Ed.).\ul 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. \ul0  \par \par Kortenkamp, U.  (1997).\'a0\'a0Every simplicial polytope with at most d+4 vertices is a quotient of a neighborly polytope.  \ul Discrete & Computational Geometry. 18,\ul0  455?462.\par \par Kortenkamp, U., Richter-Gebert J., Sarangarajan A., & Ziegler G. M.  (1997).\'a0\'a0Extremal properties of 0/1-polytopes.  \ul Discrete & Computational Geometry. 17,\ul0  439?448.\par \par Richter-Gebert, J., & Kortenkamp U.  (1997).\'a0\'a0Geometry and education in the Internet age.  \ul \ul0  \par \par Hund, U.  (1995).\'a0\'a0Pseudosph\'e4renarrangements zu Orientierten Matroiden.  \ul \ul0  \par \par }<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML+RDFa 1.0//EN"
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