I have no idea what you people are thinking, but Alli's not THAT informal of a teacher o_o
The only thing she does differently from other teachers is come up with strange assignments like "Pretend you're this person, and tweet about this event" (An actual assignment in my history class btw)

Yes, she still has that cheerleader thing going. Yes she wants to be everyone's friend. But the thing where she gets friendly with her students is usually reserved for outside of class. Otherwise, she's just a really chill teacher. >>