It was business as usual for music teacher Daniel Merck and his students on Wednesday as they put in a full day’s work at Chestatee High School. Teacher and students stayed focused on their daily tasks and calmly took in stride that their trip to perform at New York City’s St. Patrick’s Day Parade on Friday almost got scrapped because of the winter storm that slammed the Northeast. “We were supposed to leave (Wednesday) morning, but the blizzard changed the dynamics,” Merck said in between classes.