The Private Catholic school I attended was forced to teach a particular religious education curriculum by the state. However, that curriculum was highly modular, and the only testing of their methodology was final test scores. So we skipped the entire section on islam (Test was "Pick 2 religions and compare them, we were given catholicism and judaism), and we also skipped every chapter under catholicism that implied any wrongdoing, historically on the part of the catholic church, like the occupations of the holy land.