School's Rating Depends on it (Score 1)

My school, in Queensland, was the same. All of QLD schools were rated ona QCS/Average value. If they had more students doing Math C (higher level) and getting lower grades, it meant less than a Math A (easiest) getting a high grade. They didn't want students pulling down the schools over all rating. I definitely saw this over the last year when we were required to take QCS- Queensland Core Skills Test, to determine our OP (overall position), that allowed us to get into University.