Gretchen Bataille announced Wednesday that she is leaving the presidency of the University of North Texas at the end of the month, stunning many on the campus. The Fort Worth Star-Telegram  reported. Bataille was named to the position in 2006, and has been a forceful advocate for the institution's push to become a research university. Student leaders, who said that they considered her a strong ally, said they were concerned about the news. No explanation has been offered for the sudden resignation.