It is not 90, it's 104. (and at least 26 in EACH component). It seems to be a strict requirement, so ggamsoon probably has no chance for Chicago.
Also I heard that state schools look more at your English ability as you have to teach, so the chance for schools like penn state might also be affected.
Are you sure about that. I remember when I was worried about my toefl score I was checking each school website for their exact requirements and I remember I was confused about Chicago. I think they have 2 different requirements and the 104 doesn't apply for math. Yet again, I'm not sure.
I don't think the state schools have higher toefl requirement. Teaching assistantship is the main source of funding for grad students in math at any university. So they expect you to teach everywhere. Foreign students are supposed to pass some test before they start teaching.
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