@conference {449, title = {Unpacking Children{\textquoteright}s Angle "Grundvorstellungen{\textquotedblright}: The Case of Distance {\textquotedblleft}Grundvorstellung{\textquotedblright} of 1{\textdegree} Angle}, booktitle = {PME 38}, year = {2014}, month = {2014}, address = {Vancouver, Canada}, author = {Ana Kuzle and Christian Dohrmann}, editor = {Peter Liljedahl and Natalie Sinclare} } @booklet {HofKorSei-HSMVSHVDDA-2013, title = {{Handreichung zur Situation mathematischer Vorkurse an sachsen-anhaltischen Hochschulen und Vorschl{\"a}ge zu deren didaktisch-methodischer Ausgestaltung}}, year = {2013}, publisher = {Transferstelle {\quotedblbase}Qualit{\"a}t der Lehre{\textquoteleft}{\textquoteleft} am WZW Wissenschaftszentrum Sachsen-Anhalt}, keywords = {sonstige}, author = {Andrea Hoffkamp and Ulrich Kortenkamp and Susen Seidel} } @inbook {Kor-EAVA-2011, title = {Die etwas andere Vorlesung: AnOrMaL}, booktitle = {Mathematik f{\"u}r alle - Wege zum {\"O}ffnen von Mathematik. Mathematikdidaktische Ans{\"a}tze. Festschrift f{\"u}r Wilfried Herget}, year = {2011}, publisher = {Franzbecker}, organization = {Franzbecker}, address = {Hildesheim}, keywords = {invited}, author = {Kortenkamp, Ulrich}, editor = {Krohn, Thomas and Malitte, Eva and Richter, Gerd and Richter, Karin and Sch{\"o}neburg, Silvia and Sommer, Rolf} } @booklet {TrgKorJahLibMerRecSou-IPSDGROE-2010, title = {I2Geo.net {\textendash} a platform for sharing dynamic geometry resources all over Europe}, year = {2011}, keywords = {poster}, author = {Trgalova, Jana and Kortenkamp, Ulrich and Jahn, Ana Paula and Libbrecht, Paul and Mercat, Christian and Recio, Tomas and Soury-Lavergne, Sophie} } @conference {KorBesSpa-SH-2010, title = {Schnittstellenaktivit{\"a}t Hochschul-Mathematikdidaktik}, booktitle = {Beitr{\"a}ge zum Mathematikunterricht. Vortr{\"a}ge auf der 44. Tagung f{\"u}r Didaktik der Mathematik in M{\"u}nchen}, year = {2010}, pages = {61-68}, publisher = {WTM Verlag}, organization = {WTM Verlag}, address = {M{\"u}nster}, keywords = {invited}, author = {Kortenkamp, Ulrich and Bescherer, Christine and Spannagel, Christian} } @inbook {BleKor-VSL-2010, title = {VideoClipQuests as a New Setup For Learning}, booktitle = {Learning and Instruction in the Digital Age: Making a Difference through Cognitive Approaches, Technology-facilitated Collaboration and Assessment, and Personalized Communications}, year = {2010}, publisher = {Springer-Verlag}, organization = {Springer-Verlag}, chapter = {11}, abstract = {

VideoClipQuests (VCQs) are a teaching-learning approach focussed on the learner{\textquoteright}s self-activity while information is collected by searching the Internet, similar to the well- established concept of WebQuests. VCQs can be one element to sensibly integrate the possi- bilities and advantages of the virtual world into teaching. Some of the advantages of VCQs are that they allow the teachers great latitude, they can be created very easily, they are com- patible with a multitude of learning platforms, and they can be used both in e-Learning and traditional lectures. Moreover, they appear to inherently motivate the learners and thus be- come highly accepted. In this chapter we present the concept of a VCQ as well as first evalu- ation results of their influence in learning.

}, keywords = {refereed}, author = {Blessing, Axel M. and Kortenkamp, Ulrich}, editor = {Spector, J. Michael and Ifenthaler, Dirk and Isa{\'\i}as, Pedro and Kinshuk and Sampson, Demetrios G.} } @conference {SpaKor-DGAPDGS-2009, title = {Demonstrating, Guiding, and Analyzing Processes in Dynamic Geometry Systems}, booktitle = {Proceedings of the 9th International Conference on Technology in Mathematics Teaching}, year = {2009}, publisher = {ICTMT-9}, organization = {ICTMT-9}, address = {Metz}, abstract = {

Process-oriented mathematics education focuses on learning processes rather than on their outcomes only. These processes should be monitored, guided and supported by the teacher. In addition, feedback should be given on the students{\textquoteright} activities, not only on their results. Groups of 30 (school) up to more than 600 (university) learners render it impossible to support processes without appropriate technology. This paper describes the tool CleverPHL that allows for designing process-oriented learning scenarios: processes can be recorded, replayed, completed, guided, and analyzed. These features are demonstrated with dynamic geometry systems (DGS).

}, keywords = {refereed}, author = {Spannagel, Christian and Kortenkamp, Ulrich}, editor = {Bardini, C. and Fortin, C. and Oldknow, Adrian and Vagost, D.} } @conference {LibKorMer-IWIG-2009, title = {I2Geo: a Web-Library of Interactive Geometry}, booktitle = {Proceedings of the 2nd Workshop Towards a Digital Mathematics Library (DML-2009)}, year = {2009}, publisher = {Masaryk University}, organization = {Masaryk University}, keywords = {refereed}, isbn = {978-80-210-4781-5}, author = {Paul Libbrecht and Ulrich Kortenkamp and Christian Mercat}, editor = {Petr Sojka} } @conference {LadKor-RMMERMMELREMS-2009, title = {Realisations of {MERS} (Multiple Extern Representations) and {MELRS} (Multiple Equivalent Linked Representations) in Elementary Mathematics Software}, booktitle = {Proceedings of the Sixth Congress of the European Society for Research in Mathematics Education. January 28th - February 1st 2009, Lyon (France)}, year = {2009}, abstract = {

Assumptions of multiple mental representations lead to the presumption of an enhanced mathematical learning, especially of the process of internalization, due to MERs (Ainsworth 1999) and MELRs (Harrop 2003). So far, most educational software for mathematics at the primary level aims to help children to automatize mathematical operations, whereby symbolical representations are dominating. However, what is missing is software and principles for its design that support the process of internalization and the learning of external representations and their meaning themselves {\textendash} in primary school these are in particular symbols. This paper summarizes the current state of research and presents a prototype that aims to the above-mentioned purpose.

}, keywords = {refereed}, url = {http://www.inrp.fr/publications/edition-electronique/cerme6/wg7-01-ladel.pdf}, author = {Ladel, Silke and Kortenkamp, Ulrich}, editor = {Durand-Guerrier, Viviane and Soury-Lavergne, Sophie and Arzarello, Ferdinando} } @conference {KorRol-UTTLP-2009, title = {Using Technology in the Teaching and Learning of Box Plots}, booktitle = {Proceedings of the Sixth Congress of the European Society for Research in Mathematics Education. January 28th - February 1st 2009, Lyon (France)}, year = {2009}, abstract = {

Box plots (or box-and-whisker-plots) can be used as a powerful tool for visualising sets of data values. Nevertheless, the information conveyed in the representation of a box plot is restricted to certain aspects. In this paper, we discuss both the potential and limitations of box plots. We also present a design for an empirical study in which the use of a variety of tasks explicitly addresses this duality. The activities used in the study are based on an interactive box plot applet that surpasses the currently available tools and offers new ways of experiencing box plots.

}, keywords = {refereed}, url = {http://www.inrp.fr/publications/edition-electronique/cerme6/wg7-03-kortenkamp-rolka.pdf}, author = {Kortenkamp, Ulrich and Rolka, Katrin}, editor = {Durand-Guerrier, Viviane and Soury-Lavergne, Sophie and Arzarello, Ferdinando} } @conference {BleKor-VSL-2008, title = {VideoClipQuests as a New Setup For Learning}, booktitle = {Proceedings of the IADIS International Conference on Cognition and Exploratory Learning in Digital Age (CELDA 2008)}, year = {2008}, month = {10}, pages = {343{\textendash}346}, publisher = {IADIS}, organization = {IADIS}, address = {Freiburg}, abstract = {

VideoClipQuests {\textendash} in short: VCQs {\textendash} are a teaching-learning-approach focussed on the learner{\textquoteright}s self-activity while information is collected by searching the Internet, similar to the well-established concept of WebQuests. VCQs can be one element to sensibly integrate the possibilities and advantages of the virtual world into teaching. Some of the advantages of VCQs are that they allow the teacher great latitude, they can be created very easily, they are compatible with a multitude of learning platforms, and they can be used both in e-learning and traditional lectures. Moreover, they appear to inherently motivate the learners and thus become highly accepted. In this paper we present the concept of a VCQ as well as first evaluation results of their influence to learning.

}, keywords = {refereed}, author = {Blessing, Axel and Kortenkamp, Ulrich}, editor = {Kinshuk and Sampson, Demetrios G. and Spector, J. Michael and Isa{\'\i}as, Pedro and Ifenthaler, Dirk} } @conference {SpaKor-CWFUK-2007, title = {CleverPHL {\textendash} ein Werkzeug zum flexiblen Umgang mit Konstruktionsprozessen in DGS}, booktitle = {Beitr{\"a}ge zum Mathematikunterricht. Vortr{\"a}ge auf der 41. Tagung f{\"u}r Didaktik der Mathematik in Berlin}, year = {2007}, publisher = {Franzbecker}, organization = {Franzbecker}, address = {Hildesheim}, keywords = {invited}, url = {http://www.mathematik.tu-dortmund.de/ieem/cms/media/BzMU/BzMU2007/Spannagel_\%20Kortenkamp.pdf}, author = {Spannagel, Christian and Kortenkamp, Ulrich} } @conference {SpaKor-PBLAWA-2007, title = {Prozesse beim {L}ernen mit {DGS}: {A}ufzeichnung, {W}iedergabe, {A}nalyse}, booktitle = {Tagungsband des Arbeitskreis Geometrie der GDM}, year = {2007}, publisher = {Franzbecker}, organization = {Franzbecker}, address = {Hildesheim, Berlin}, keywords = {refereed}, author = {Spannagel, Christian and Kortenkamp, Ulrich}, editor = {Ludwig, Matthias} } @conference {FesKor-TGAWV-2007, title = {Teaching Graph Algorithms with {V}isage}, booktitle = {Proceedings of CADGME 2007 in P{\'e}cs}, year = {2007}, month = {6}, keywords = {invited}, author = {Fest, Andreas and Kortenkamp, Ulrich}, editor = {S{\'a}rv{\'a}ri, Csaba and Lavicza, Zsolt} } @conference {MulBesKorSpa-ICAMCSP-2006, title = {Intelligent Computer-aided Assessment in the Math Classroom: State-of-the-art and Perspectives}, booktitle = {Proceedings of the IFIP WG 3.1, 3.3, \& 3.5 Joint Conference Imagining the future for ICT and Education, Alesund, Norway}, year = {2006}, publisher = {IFIP}, organization = {IFIP}, address = {Alesund}, keywords = {refereed}, author = {M{\"u}ller, Wolfgang and Bescherer, Christine and Kortenkamp, Ulrich and Spannagel, Christian} } @conference {KorMat-VLLM-2004, title = {Vernetztes Lehren und Lernen im Mathematikunterricht}, booktitle = {Grundfragen multimedialen Lehrens und Lernens. Tagungsband des 2. Workshops GML2004}, year = {2004}, publisher = {Alcatel SEL}, organization = {Alcatel SEL}, keywords = {refereed}, author = {Kortenkamp, Ulrich and Materlik, Dirk}, editor = {Fellbaum, Klaus and Rebensburg, Klaus and Schwill, Andreas} } @booklet {KirNorRudSabUlr-EAFMNU-2003, title = {Empfehlungen zur {A}usstattung von {F}achraum-{M}edieninseln f{\"u}r den mathematischen und naturwissenschaftlichen {U}nterricht}, year = {2003}, month = {11}, publisher = {Senatsverwaltung Bildung, Jugend Sport, Berlin}, keywords = {invited}, author = {Kirstein, J{\"u}rgen and Nordmeier, Volkhard and Rudolf, Rass and Sabina, Jeschke and Ulrich, Kortenkamp} } @conference {Kor-IGC-2001, title = {Die interaktive {G}eometrie-{S}oftware {C}inderella}, booktitle = {Tagungsband Learntec 2001}, volume = {2}, year = {2001}, pages = {525{\textendash}532}, address = {Karlsruhe}, keywords = {refereed}, author = {Kortenkamp, Ulrich}, editor = {Beck, Uwe and Sommer, Winfried} } @article {KorRicSarZie-EP0-1997, title = {Extremal properties of 0/1-polytopes}, journal = {Discrete \& Computational Geometry}, volume = {17}, year = {1997}, pages = {439{\textendash}448}, abstract = {

We provide lower and upper bounds for the maximal number of facets of a d-dimensional 0/1-polytope, and for the maximal number of vertices that can appear in a two-dimensional projection ("shadow") of such a polytope.

}, keywords = {refereed}, url = {http://link.springer.de/link/service/journals/00454/htabst/17n4p439.html}, author = {Kortenkamp, Ulrich and Richter-Gebert, J{\"u}rgen and Sarangarajan, A. and Ziegler, G{\"u}nter M.} }