Ann and disrespect
As somebody who works with kids of the age depicted in the film, I found this decidedly frustrating to watch. Why was that Ann kid not punished for the way she behaved in class, specifically regarding how she treats Albas character? If a kid spoke to me or another teacher like that you can rest assured they'd be in a whole heap of trouble. She'd spend her life parked outside the principals office, and parents would be called in.
A teachers presence in the classroom is built upon respect, and these kids (Lisa excepted, apparently) have zero respect for Albas character. She is a terrible teacher, and in reality the kids would run wild... oh, and she would INSTANTLY lose her job for the whole axe scenario.
Sorry, I just couldn't see it in anything but a teachers eyes...