Thanks for the replies. One thing DD14 used to do that made me think that she wasn't too bright was to mix up opposites. I really should have kept track of the things she would mix up, but the most notable was hot and cold. She would say something hot was cold and vice versa, even though we would point out her mistake. This went on until she was about six years old. Once in a while she still asks for the definition of a word (can't think of an example right now). It will be a word that you seldom use, but you know the definition - often DD8 will know the definition.

On the other hand, looking back, she did have good spatial relation skills at a young age (and others pointed this out to us).

La Texican, thanks for the College Confidential link. I look at that site often, though DD17 has no interest in looking at the advice there.