Perhaps they have better things to do...
Besides while its "required" its not actually "required" to be read:
From <a href="http://www.unc.edu/srp/>UNC web site:
This year's reading is Approaching the Qur'án: The Early Revelations, translated and introduced by Michael Sells. Although the summer reading is required, if any students or their families are opposed to reading parts of the Qur'án because to do so is offensive to their own faith, they may choose not to read the book. These students should instead complete their one-page response on why they chose not to read the book.
Tell me, would this reading have even have made a single news story if it was LAST summer?
I very much doubt it.
Cheers,
Tony