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Journal of Research in Science Teaching > 60 > 6 > 1292 - 1328
Computing in Science & Engineering > 2008 > 10 > 5 > 46 - 53
Journal of Research in Science Teaching > 60 > 6 > 1292 - 1328
Computing in Science & Engineering > 2008 > 10 > 5 > 46 - 53