RQ1: Do students space or mass their use of the tool? (A Spaced, Interleaved Retrieval Practice Tool that is Motivating and Effective)
According to this figure, students space use the practice tool.

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RQ3: Does the practice tool usage correlate with higher final exam grades? (A Spaced, Interleaved Retrieval Practice Tool that is Motivating and Effective)
Distributions and Correlations (A Spaced, Interleaved Retrieval Practice Tool that is Motivating and Effective)
End of Course Survey (A Spaced, Interleaved Retrieval Practice Tool that is Motivating and Effective)
Voluntary Use of the Practice Tool Beyond Requirements (A Spaced, Interleaved Retrieval Practice Tool that is Motivating and Effective)
Related
RQ3: Does the practice tool usage correlate with higher final exam grades? (A Spaced, Interleaved Retrieval Practice Tool that is Motivating and Effective)
Distributions and Correlations (A Spaced, Interleaved Retrieval Practice Tool that is Motivating and Effective)
End of Course Survey (A Spaced, Interleaved Retrieval Practice Tool that is Motivating and Effective)
Voluntary Use of the Practice Tool Beyond Requirements (A Spaced, Interleaved Retrieval Practice Tool that is Motivating and Effective)