Condoleezza Rice, a former secretary of state, is scheduled to give a series of lectures at Harvard University. Rice is slated to give her first talk tomorrow on American foreign policy and the black experience. She’s also scheduled to give foreign policy lectures Wednesday and Thursday. The lectures are part of the school’s W.E.B. Du Bois Institute for African and African American Research, Kennedy School of Government, Institute of Politics, and JFK Jr. Forum. Recently, the former aide to George W. Bush has been promoting her new book, “Extraordinary, Ordinary People: A Memoir of Family.’’ Rice was secretary of state from 2005 to 2009.