When course was taught | # of students | Average pre-test score (points)^ | Average post-test score (points)^ | Mean difference (points) | Standard deviation | Paired t-test p-value* |
Winter 2013 | 20 | 9.4 | 12.2 | 2.8 | 2.58 | 0.000 |
January 2014 | 27 | 7.4 | 10.9 | 3.1 | 0.97 | 0.000 |
Spring 2014 | 12 | 8.3 | 10.6 | 2.3 | 1.92 | 0.019 |