There are two schools in Fort Walton Beach....Liquid Surf and Sail and Sea-n-sky...both are on main street in Fort Walton beach. There is a school in Pensacola beach...the Klepp brothers teach there...not sure what shop.
Emerald Coast Kiteboarding in Panama City Beach has lessons as well.
www.sea-n-sky.com
www.emeraldscoastkiteboarding.com