Nicholas Lemann will announce today that he is stepping down as the journalism dean at Columbia University, The New York Times reported. As dean, Lemann has been a prominent voice in discussions of the reform of journalism education, and has attracted new resources and faculty slots to his program. While he has been popular with many students, Columbia's journalism school (like many others) has seen fairly steady criticism from students over their difficult job prospects. Lee C. Bollinger, Columbia's president, plans to personally lead the search for a new dean.