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- ItemQuality evaluation of open educational resources(Cham : Springer, 2020) Elias, Mirette; Oelen, Allard; Tavakoli, Mohammadreza; Kismihok, Gábor; Auer, Sören; Alario-Hoyos, Carlos; Rodríguez-Triana, María Jesús; Scheffel, Maren; Arnedillo-Sánchez, Inmaculada; Dennerlein, Sebastian MaximilianOpen Educational Resources (OER) are free and open-licensed educational materials widely used for learning. OER quality assessment has become essential to support learners and teachers in finding high-quality OERs, and to enable online learning repositories to improve their OERs. In this work, we establish a set of evaluation metrics that assess OER quality in OER authoring tools. These metrics provide guidance to OER content authors to create high-quality content. The metrics were implemented and evaluated within SlideWiki, a collaborative OpenCourseWare platform that provides educational materials in presentation slides format. To evaluate the relevance of the metrics, a questionnaire is conducted among OER expert users. The evaluation results indicate that the metrics address relevant quality aspects and can be used to determine the overall OER quality.