When I had my then-boyfriend take my photos almost two years ago (wow, doesn't time fly!) I wore a cute sundress. Sundresses are always a good option, or cute top and skirt or top and pants. Nothing too revealing or outrageous, and make sure it looks like them-i.e. if a girl normally wears her hair curly don't straighten it for the photo or no one will recognize her.
Clemson's recruitment registration software only lets you upload one photo, I think, so the headshot or waist up are most important for recognizing the PNM if that's the case where your girls are going. How nice of you to help them out like that! I am sure the photos are going to be lovely
