@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 {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 = {<p>
	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.</p>
},
	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}
}
