@conference {LadKor-FMBUNO-2011,
	title = {Finger-Symbol-Sets and Multi-Touch for a better understanding of numbers and operations},
	booktitle = {Proceedings of CERME 7, Rzeszow},
	year = {2011},
	abstract = {<p>
	Basic concepts of numbers and operations are fundamental for mathematical learning. Suitable materials for developing such basic concepts are hands and fingers. Among other things, this is because of their natural structure of 5 and 10. To support the development of concepts and the process of internalization a linking between different forms of representations by the computer can be helpful. To benefit of both, the advantages of the hands and fingers and the automatically linking, we suggest using multi-touch-technology, i.e. computer input devices that are able to recognize several touch gestures at the same time. Here, children can present numbers with their fingers that produce virtual objects. These objects can be automatically linked with the symbolic form of representation.</p>
},
	keywords = {refereed},
	author = {Ladel, Silke and Kortenkamp, Ulrich}
}
@conference {KorFes-FCIAEMS-2008,
	title = {From {CAS/DGS} Integration to Algorithms in Educational Math Software},
	booktitle = {Proceedings of ATCM 08},
	year = {2008},
	abstract = {<p>
	The standard triumvirate of \&nbsp;"New Media" in the mathematics curriculum {\textendash} CAS, DGS and spreadsheet {\textendash} is establishing its secured position in teaching. This article illustrates, using the evolution of the software Cinderella as a guiding example, how a further integration of these products will allow for new teaching approaches. These will support the formation of important mathematical competencies, such as the ability to find and rate mathematical models for real world problems. A central observation is the algorithmic nature of userdefined functions and that it is crucial for the learning process to be able to execute algorithms step by step.</p>
},
	keywords = {refereed},
	author = {Kortenkamp, Ulrich and Fest, Andreas}
}
@conference {Kor-FMS-2001,
	title = {The future of mathematical software},
	booktitle = {Proceedings of MTCM 2000},
	year = {2001},
	publisher = {Springer-Verlag},
	organization = {Springer-Verlag},
	keywords = {refereed},
	url = {http://kortenkamps.net/papers/2001/future.pdf},
	author = {Kortenkamp, Ulrich}
}
@article {Kor-FDG-2000,
	title = {Foundations of {D}ynamic {G}eometry},
	journal = {Journal f{\"u}r Mathematikdidaktik},
	volume = {21},
	number = {2},
	year = {2000},
	pages = {161{\textendash}162},
	keywords = {sonstige},
	author = {Kortenkamp, Ulrich}
}
@mastersthesis {Kor-FDG-1999,
	title = {Foundations of Dynamic Geometry},
	year = {1999},
	month = {11},
	school = {ETH Z{\"u}rich, Institut f{\"u}r Theoretische Informatik},
	type = {phdDissertation},
	address = {Z{\"u}rich},
	keywords = {qualifikation},
	url = {http://kortenkamps.net/papers/1999/diss.pdf},
	author = {Kortenkamp, Ulrich}
}
