Death.

I mean if you're in Paper School it's probably rigged against you; iirc Circle puts Algebraic equations up on her blackboard and chances are the average kiddo doesn't know algebra. But here's the kicker.

Last I recall, Circle doesn't understand algebra either. And all things considered, if you're even like slightly above average, you probably won't have too much trouble with algebra (while this is coming from someone who had to endure Honors-level Algebra II last year and is currently halfway through Honors-level PRE-CALCULUS, algebra on its own is actually decently easy to figure out once you know how the process of solving something goes). Hell, you might even be able to stump Circle herself if you try your damndest.

From what I can gather, just because she's like 9'7", has a compass for a left arm, and can probably put a hole in the average school locker doesn't mean she'll be able to catch you super easily while running. She only has one actual hand, and if she wanted to do anything she'd probably have to rely on Bloomie and/or Thavel for help (side note: Miss Circle is also apparently shorter than Gru from Despicable Me; that guy is somehow like 14 feet tall). If you're smart and know that the bully students will try to start something, you'd probably have brought the ultimate secret weapon - pocket sand - and could potentially use it to get away.

Realistically, the three killer teachers would have to work in tandem for you to get got and would have to lock all escape routes. Presuming they stage you failing a test and you're not someone who takes nonsense like that sitting down

you'll probably be able to make them back off at least a little. Someone'll probably hear the commotion, and if you're lucky enough Miss Grace (the principal) might just come and drag you away anyway.

TL;DR, someone ought to investigate Miss Circle. If she ain't understand Algebra, there's a chance she got her teaching license from the back of a cereal box.