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ROMAN, Diego; THOMPSON, Karen; ERNST, Lisa. WordSift: A free web-based vocabulary tool designed to help science teachers in integrating interactive literacy activities. Science Activities: Classroom Projects and Curriculum Ideas. 2016-01-02, roč. 53, čís. 1, s. 13–23. Dostupné online [cit. 2022-04-04]. ISSN0036-8121. DOI10.1080/00368121.2015.1094025.