Streaming is the practice of grouping students based on their magical potential, usually at the end of the entrance exam the candidate has to don a talking pointed hat which then announces their respective classes. Supposedly this should encourage competitiveness in gifted classes while improve sportsmanship in borderline cohort who otherwise drop out of school entirely. I like to think streaming isn't promoting elitism but then the latter isn't all that bad except 99% of them would experience Dunning Kruger effect and magic can be very dangerous in the wrong hand, so my question is why must there be streaming for all magic schools?