Hmm. The whole atmosphere was extremely dark. Students were getting pretty severe punishments for relatively minor crimes. Most people had no idea what had happened to their Muggleborn friends. There was a lot of Slytherin favoritism from Snape (and the Carrows). There was this student-organized club that favored blood purity (I remember something about care packages for Squibs, whose magic had been "stolen" by Muggleborns). Called SIP, I think it was? Strength in Purity? There was also the DA hiding out in the Room of Requirement. For the most part, I think it was pretty close to canon, with some additives. Slytherin and Hufflepuff were neck-in-neck for the Quidditch Cup, but Slytherin won. Pretty sure Gryffindor lost every match. Their Seeker kind of sucked, but Potter's a tough act to follow.
Anyone correct me if I'm wrong?
I feel like I'm missing stuff.