Jinx! (2007)

When nerdy second grader Eleanor tries to join a schoolyard game, a bully named Rachel "jinxes" her. Unable to speak until someone says her name, Eleanor sets off on a madcap quest to break Rachel's diabolical spell before the 3:00 bell rings. As she navigates the cutthroat world of second grade, Eleanor seeks help from a stern math teacher, a deranged abstract artist, and a clueless father - with disastrous results!