A life skills teacher and cheerleading coach at a charter school in Arizona has been busted for having a sexual relationship with a 17-year-old boy who had been missing since February, according to reports. Robyn Rogers, 44, a teacher at Telesis Preparatory Academy, a charter school in Lake Havasu City, was charged with three counts of sexual conduct with a minor, Today’s News-Herald reported. Police who had been investigating the boy’s disappearance from his home on Valentine’s Day received a tip that the minor was staying at an address in Lake Havasu City. Officers with the Lake Havasu Polic…