Companion websites of today typically contain multiple-choice questions on topics already covered by other tasks in thecorresponding textbook. Such redundancy does not help to increase usage of digital learning resources in schools, nor does it helpto develop a holistic digital competence. Using multimodal social-semiotic theory, I propose that quality criteria should considerthe didactical interplay between textbook and its companion website. My claim is that textbooks and companion websites that arebetter integrated will ensure increased usage by being a qualitative necessity in addition to the textbook
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