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Historically Black colleges and universities (HBCU) are 4 percent of the colleges in the United States, but they graduate in the baccalaureate degree about 28 percent of all Black students; 50 percent of all Black public school teachers are trained at HBCUs; 75 percent of all Black doctors, physicians, and engineers are trained at HBCUs.
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Cheri L. Mills (Lent of Liberation: Confronting the Legacy of American Slavery)