@article {LadKor-AAMTEML-2012,
	title = {An activity-theoretic approach to multi-touch tools in early maths learning},
	journal = {The International Journal for Technology in Mathematics Education},
	volume = {20},
	number = {1},
	year = {2013},
	abstract = {<p>
	In this article we present an activity theory based framework that can capture the complex situations that arise when modern technology like multi-touch devices are introduced in classroom situations. As these devices are able to cover more activities than traditional technologies, even computer-based, media, we have to accept that they now take a larger role in the model of interactions. We reflect this fact by moving the artefact into the centre of our observations, leading to an artefact-centric activity theory (ACAT). The theory was developed in the need of analysing learning environments for primary maths education.</p>
},
	keywords = {refereed},
	url = {http://www.tech.plym.ac.uk/research/mathematics_education/field\%20of\%20work/ijtme/volume_20/number_one.html$\#$one},
	author = {Ladel, Silke and Kortenkamp, Ulrich}
}
