America's Drive-In to support local public school teachers and students with $15 million commitment over next five years OKLAHOMA CITY, 2016-May-04 — /EPR Retail News/ — Today (May 3, 2016), SONIC® Drive-In (NASDAQ: SONC), the nation's largest chain of drive-in restaurants, announced its partnership with Julianne Hough to launch #ThanksTeach, a social media campaign to celebrate Teacher…