Text and Data Mining valid from 2018-06-12
Received: 1 December 2017
Accepted: 23 April 2018
First Online: 12 June 2018
: DA is a PhD student on the Education & ICT doctoral programme at Universitat Oberta de CatalunyaAS is director of the UNESCO Chair in Education & Technology for Social Change and associate professorat Universitat Oberta de Catalunya
: The authors declare that they have no competing interests.
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