Hermione fully uprooted the entire schooling system, removing all forms of Headmaster and replaced it with a group of highly qualified individuals. So now instead of just one view being implemented onto the school with barely any repercussions, they went through a fool proof agenda on what needed to happen and where. She also changed the studies, completely removing all forms of muggle studies and activities, and replaced it with classes the students would need, like Parenting, Dark Arts, and Business.