It represents how nicely the student is carrying out with the disciplines. As described, it's the equivalent on the GPA. It could be calculated by the next system: C R = ? k = one N C C i ? file ( N i ) ? k = 1 N C C i displaystyle CR=textstyle frac textstyle sum _ k=1 ^ NC C_ i cdot f(N_ i )displaystyle textstyle sum _ k=1 ^ NC C_ i displaystyle d