School Calendar RALEIGH, N.C. -- The state's top teacher lobbying group may be ready to let the General Assembly mandate when the school calendar starts and ends in local districts. Member surveys by the North Carolina Association of Educators show at least 60 percent of those polled statewide support legislation that would require schools to start no earlier than Aug. 25 and end by June 10. The measure also would cut in half, to 10, the number of teacher workdays -- days when students are not in session. NCAE, with 70,000 members, strongly opposed a bill last year that would...