ROGERSVILLE — After three months in a Memphis hospital, with maybe another year left to go, 6-year-old Mack Ward’s spirits received a much needed boost during chemotherapy last week when he received a “Skype” call from his kindergarten classmates in Rogersville.Ward’s educational career had just gotten started when his family received news two days before Christmas that he has a rare type of bone cancer.Four months into the school year in Kim Risner’s kindergarten class at Joseph Rogers Mack had become one of the most popular students in the class thanks to his energetic, optimistic, upbeat personality.When he didn’t return to class after Christmas break everyone was concerned.