KINGSPORT — Come one, come all students, and bring your Hawaiian shirts and hula skirts. The 10th annual Back to School Expo of Kingsport City Schools is set for July 30 at the Farmers Market downtown. There is no registration fee or cost to attend. Vendors receive one complimentary table. The event will feature a Hawaiian theme and vendors are encouraged to participate. The expo will take place from 3 p.m.