Mastering Chemistry

Evidence about an online tutorial system

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Evidence highlights

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20 extra problem attempts

associated with a 1 percentage point increase in final exam scores (Fall 2016)

30 extra problem attempts

associated with a 1 percentage point increase in total course scores (Fall 2016)

24 extra problem attempts

associated with a 1 percentage point increase in final exam scores (Winter 2017)

30 extra problem attempts

associated with a 1 percentage point increase in total course scores (Winter 2017)