Originally Posted by indigo
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I didn't prepare for the SAT or GRE.
This is the way it seems to have been intended, way back when these assessments began.

I would say students who speak mainly another language has to prepare. I learned English as a subject. But I did not learn Math in English. So I at least need to know how Math in English looks like to be on level playing field with the native speakers of English.

I think everyone can get higher scores by prep. But few people can get close to 2400 no matter how they prepped. At least that is how I felt when I took it 20 years ago.