Give Chris Cumberland a call (678) 852-8678. He's a former Yankee and paid ECB coach. He instructs out of the Acworth Youth Sports building in downtown Acworth. His rates are very reasonable and he's good with the kids. He also coaches a 17U travel team himself.
My son is 13 playing on 13U and 14U Majors teams at ECB has been using him for pitching instruction so you can bet we searched long a hard for a quality instructor. We see him working with younger boys on batting all the time. He knows his stuff. Hope this helps.