AEPhi has, or has had, chapters at the following schools:
Ivy League:
Barnard (Columbia) - Alpha
Columbia Univ. Teachers College - Gamma (does this count?)
UPenn - Theta
Cornell - Kappa
Yale - Beta Delta
Ivy+:
MIT - Beta Epsilon
Northwestern - Omicron
Duke - Alpha Epsilon
Carnegie Mellon - Alpha Nu
hmmm... who else would be considered Ivy+...
Munchkin03 - AKA actually has an MIT chapter that is recognized by the school. I believe it predated all the NPC sororities.