<p>I believe it depends on what schools you are trying to get into.
ACTs can be taken a lot of times in substitute around the Midwest but other places maybe not. If you want to get into Ivies, I suggest taking both or atleast SAT.</p>
<p>i think there are so many threads on this, and the general consensus is that if the school says they are, then they are. (presidential scholar is pretty biased towards the SAT tho! :D)</p>
<p>and Ivies don't care they like ACT scores as well--but they would also like SAT subject scores</p>
<p>Every college in the US that is listed in any US News ranking of colleges accepts either the ACT or the SAT (except some require no test) and do not treat one as being better than the other. Where you have issues is SAT IIs. Some colleges (mostly high ranks) require those. Thus, regardeless of whether you submit SAT or ACT you may have to also submit SAT IIs. Nevertheless, some of those colleges that require SAT IIs will take the ACT in lieu of both the SAT and SAT IIs -- examples: Yale, Brown, Penn, Pomona, Wesleyan, Amherst, Tufts. Another issue is scholarships; you cannot qualify for some without the SAT -- e.g., National Merit.</p>