She cannot claim herself if you *can* claim yer even if you do not claim her - the tax law does not permit that.
In fact there are special questions just for that in the personal information section: 1) CAN you be claimed as a dependent by another taxpayer?; and 2) Were (or will you be) claimed by that taxpayer?
If #1 is yes then the student cannot claim them self.
If #1 is yes and #2 is no, then the student still cannot claim them self but there are certain educational credits normally claimed by the parent that the student can claim. That is the only difference.