I have heard that they can be found online with answers but no explanations. I can only find free response questions. Help please...

Any specific question? They don't usually put up the multiple choice answers because so many teachers use the old exams to prepare students. Your teacher should have answers though (if you're not independent study)

They sometimes release the questions from a few tests.. though if they aren't on the college board website, it might not be those specific years.

Oh, I was thinking you wanted the answers. I think they put up questions from tests every few years but I'm not sure where to find them.