DUSTIN LUCA/Staff Photo. Andover Education Association Vice President Jen Meagher speaks to dozens of teachers gathered in the lobby of Andover High School Tuesday, Jan. 3 at 2:35 p.m., exactly half an hour after the end of the school day. Under the most recent version of the teacher's contract, which was signed in 2008 and expired on Aug. 31, 2010, teachers are contractually required to work only half an hour beyond the end of the school day. 1/3/12

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