Oak Grove Lutheran School students open their presentation of “Big Fish” on March 8 in the Scheels Center for the Performing Arts. The production runs for seven shows over two weekends, including Sunday matinees. Shows are scheduled at the following times: March 8 and 9 at 7 p.m.; March 10 at 2 p.m.; March 14-16 at 7 p.m.; and March 17 at 2 p.m.    The musical is based on Daniel Wallace’s 1998 novel and the 2003 film directed by