Pearson explored the relationship between the use of Sistema COC with learner outcomes like students' achievement in the simulated national assessments. Pearson conducted a study comparing results on the SimENEM, a practice exam, for students in Sistema COC schools with similar students in public and private schools not using Sistema COC. The study found that Sistema COC students statistically outperformed other similar non-Sistema COC public school attendees in SimENEM subjects Language, and Natural Science, by a large margin (i.e. 21 and 17 percentile points). And, there were no statistically significant differences in performance between Sistema COC students and non-Sistema COC private school students in Language, Math, Human Science, or Natural Science. In the context of this study, this summary presents comparative statements about the efficacy of Sistema COC. [For the full report, "Sistema COC: A Study of the Effects of Sistema COC on Student Achievement in Brazil. Technical Research Report," see ED609241.]