Bus lines, tornado drills, lunch duty and conference calls — they’re all in a day’s work for principals at Forsyth County schools. But for one day, bankers, administrators, executives and leaders of the Forsyth County business community recently got to share the duty of overseeing a campus.The arrangement was part of the Cumming-Forsyth County Chamber of Commerce’s inaugural Principal for a Day program.David Seago, chairman of the chamber’s board of directors, said he borrowed the idea from Gwinnett County because “it really brings the business community and the school system together.”“We talk about education being so important to the community and economic development. We say it all the time and everybody believes us,” he said.