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International Journal of Science and Mathematics Education > 2014 > 12 > 2 > 371-393
Journal of Research in Science Teaching > 50 > 9 > 1047 - 1067
Computers & Education > 2009 > 52 > 3 > 562-570
International Journal of Science and Mathematics Education > 2014 > 12 > 2 > 371-393
Journal of Research in Science Teaching > 50 > 9 > 1047 - 1067
Computers & Education > 2009 > 52 > 3 > 562-570