AlexanderHamilton that must be it. DS has an exam today, 1hr45, worth 50% on Catholicism. Judaism worth 25% on Wednesday. Then Catholicism again for the remaining 25% next week.
Judaism isn't too bad. There's a few words and practices to memorise but its all relatively superficial, and fairly obvious (e.g. surprise, surprise they do births, deaths and marriages and throw in coming of age)
The Catholicism parts, however, go a lot deeper, way beyond what anyone who just goes to church every Sunday and Holy Day of Obligation might ever encounter. It encompasses a lot of fairly obscure things - the Cosmological argument for the existence of God is what springs to mind here.