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Journal of Research in Science Teaching > 61 > 4 > 772 - 808
International Journal of Computer-Supported Collaborative Learning > 2018 > 13 > 2 > 167-187
Educational Technology Research and Development > 2016 > 64 > 4 > 555-571
Educational Technology Research and Development > 2016 > 64 > 4 > 735-762
Educational Technology Research and Development > 2011 > 59 > 2 > 267-289
Educational Technology Research and Development > 2011 > 59 > 6 > 765-782