@inbook {LadKor-EML-2014, title = {Number concepts {\textendash}- processes of internalization and externalization by the use of multi-touch technology Silke Ladel and Ulrich Kortenkamp}, booktitle = {Early Mathematics Learning}, year = {Submitted}, chapter = {3-3}, keywords = {ACAT}, author = {Silke Ladel and Ulrich Kortenkamp} } @unpublished {403, title = {The Development of an Instrument to Measure Geometric Creativity}, year = {In Press}, abstract = {

There is no doubt that students can learn and develop their creative potential, if we use the
appropriate programs that successfully teach them the creativity skills and its operations.
However, in order to measure the effectiveness of such programs we need an instrument to
assess creativity. This paper presents the development of a test that can be used to assess
geometric creativity and to obtain concrete indicators of creative potential in geometry. The
test was designed as a part of larger experimental study conducted to assess the geometric
creativity among mathematically gifted students, and to develop their geometric creativity
using dynamic geometry software. It uses four components that we consider to be basic
ingredients of geometric creativity: fluency (based on the number relevant responses),
flexibility (based on the number of different categories of the relevant responses), originality
(based on the statistical infrequency of responses in relation to peer group), and elaboration
(based on number of redefined follow-up questions or problems).

}, keywords = {creativity, elaboration, flexibility, fluency, geometric creativity, originality}, author = {El-Demerdash, Mohamed and Ulrich Kortenkamp} } @book {KorBraBenKruLadVog-EML-2014, title = {Early Mathematics Learning}, year = {2014}, publisher = {Springer-Verlag}, organization = {Springer-Verlag}, keywords = {submitted}, isbn = {978-1-4614-4677-4}, url = {http://www.springer.com/education+\%26+language/mathematics+education/book/978-1-4614-4677-4}, editor = {Ulrich Kortenkamp and Birgit Brandt and Christiane Benz and G{\"o}tz Krummheuer and Silke Ladel and Rose Vogel} } @inbook {LadKor-DTBLEPVUAAT-2013, title = {Designing a technology based learning environment for place value using artifact-centric activity theory}, booktitle = {Proceedings of the 37th conference of the International Group for the Psychology of Mathematics Education. Mathematics learning across the life span}, volume = {1}, year = {2013}, pages = {188-192}, keywords = {refereed}, author = {Silke Ladel and Ulrich Kortenkamp}, editor = {Anke M. Lindmeier and Aiso Heinze} } @article {KisBurVolKor-ESSMSPS-2013a, title = {An Explorative Study of Search of Model Space in Problem Solving}, year = {2013}, note = {Submitted for publication}, keywords = {submitted}, author = {Saskia Kistener and Bruce Burns and Regina Vollmeyer and Ulrich Kortenkamp} } @booklet {KisBurVolKor-ESSMSPS-2013, title = {An Explorative Study of Search of Model Space in Problem Solving}, year = {2013}, abstract = {Building on dual-space theories, the three-space theory of problem solving suggests to add search of a model space in addition to search of experiment and hypothesis space. This study aimed at exploring the three postulated spaces, especially model space, by means of verbal protocols. Participants (n=32) were asked to think aloud while working with a computer based learning program. With this program they could learn about torques in physics using interactive graphics in which experiments with levers and forces could be conducted. Their knowledge about torques was tested before and after working with the program. Verbal protocols were analyzed with regard to the amount of search of the three spaces and regarding the quality of the participants{\textquoteright} models for torques. The three postulated spaces could be reliably identified in the protocols. For validity, the model quality score was related to performance and predicted final knowledge beyond prior knowledge. Our results add to the validity of model space and allow us to derive more specific hypotheses from the three-space theory.}, keywords = {poster}, url = {http://www.academia.edu/4237499}, author = {Saskia Kistener and Bruce Burns and Regina Vollmeyer and Ulrich Kortenkamp} } @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} } @conference {LibKor-RMDEA-2013, title = {The Role of Metadata in the Design of Educational Activities}, booktitle = {Proceedings of CERME 8, Antalya}, year = {2013}, keywords = {refereed}, author = {Paul Libbrecht and Ulrich Kortenkamp} } @conference {LibKorRebMul-TCTA-2013, title = {Tales of a Companion Teacher Analytics}, booktitle = {Proceedings of the 2nd International Workshop on Teaching Analytics (IWTA-2013)}, year = {2013}, keywords = {refereed}, url = {http://ceur-ws.org/Vol-985/paper4.pdf}, author = {Paul Libbrecht and Ulrich Kortenkamp and Sandra Rebholz and Wolfgang M{\"u}ller}, editor = {Ravi Vatrapu} } @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} } @book {Kor-LK-2009, title = {Lernbausteine Klammergebirge}, year = {2009}, note = {206 Noppenbausteine mit Praxisbuch.}, publisher = {Terzio Verlag}, organization = {Terzio Verlag}, keywords = {material}, url = {http://www.book2look.com/vBook.aspx?id=bjEUHu6dis}, author = {Ulrich Kortenkamp} } @book {Kor-LZ-2009, title = {Lernbausteine Zahlenmauern}, year = {2009}, note = {230 Noppenbausteine mit Praxisbuch.}, publisher = {Terzio Verlag}, organization = {Terzio Verlag}, keywords = {material}, url = {http://www.book2look.com/vBook.aspx?id=6N4Ovvpbs9}, author = {Ulrich Kortenkamp} }