What we learned
In the context of this study, we can make the following comparative statements about the efficacy of Sistema COC. The research team equated comparison groups by matching examinees older than 18, on the previous year's (2017) SimENEM scores, grade level, number of people living in the household, and years attending the same school2:
- Sistema COC students statistically outperformed other similar non-COC public school attendees in both language and natural science by a large margin (21 and 17 percentile points or 0.56 and 0.44 standard deviations, respectively). There were no significant differences in math and human science3.
- There were no significant differences in performance between COC students and non-COC private school students in language, math, human science and natural science4.