June 28 and 29, Monday and Tuesday -- Diversity, lowering student drop-out rates and issues influencing school board members will be among the topics addressed when about 20 Central Valley school district superintendents gather for workshops in Fresno. "The Superintendent in an Era of Accountability" academy has been organized by the University of California Educational Research Center, managed by the UC Davis School of Education, in its efforts to support and strengthen district leadership in the Central Valley. Highlights of the sessions include "Leadership and Diversity: Fifty Years After Brown vs. the Board of Education," 1:15 p.m. Monday; "Issues Influencing School Board Members," 3 p.m. Monday; "Dropping the Dropout Rate: Aggressively Stopping Students from Leaving School," 1:15 p.m. Tuesday; and a look at the challenges ahead in a session called "The Good the Bad and the Ugly: What Every Superintendent Should Know in 2004," 3 p.m. Tuesday. Sessions, from 9 a.m. to 4:30 p.m., will be held at the UC Center at 550 East Shaw Ave., Fresno.