Best known as the bullhorn-toting, baseball-bat-wielding principal of the rough Eastside High School in Patterson, N.J., from 1983 to 1990, Clark was the subject of the hit movie Lean On Me, starring Morgan Freeman. A former Army drill instructor with a bachelor's degree from William Paterson College and a master's in administration supervision and doctorate equivalence from Seton Hall University, Clark sees education as a mission. After only two years of his hard-nosed leadership at Eastside High, the formerly raucous institution was declared a model school by New Jersey's governor, and Clark himself was named one of the nation's 10 "Principals of Leadership" in 1986.