One Oklahoma elementary school has a strict dress code policy -- no college apparel that isn't from Oklahoma.Last week, Wilson Elementary School's principal told 5-year-old Cooper Barton to turn his T-shirt inside-out because it violated Oklahoma City Public Schools' dress code, KWTV reports. The boy was wearing a University of Michigan shirt.District policy bars students from wearing "clothing bearing the names or emblems of all professional and collegiate athletic teams (with the exception of Oklahoma colleges and universities.)"Read More... More on Education: Oklahoma