The hallways at Forsyth Central High School were barely empty when work began to create the schools STEM Academy and make additional campus upgrades.“We started the day the kids got out,” said Walt Fairchild, construction coordinator. “They ended early at 12 p.m. and we started at 1 p.m.”STEM — short for Science, Technology, Engineering and Mathematics — will focus on combining rigorous core classes with career-technical course offerings to give students real-world experience. “As shown by the U.S. Labor Department’s most recent 10-year employment projections, of the 20 fastest-growing occupations projected for 2014, 15 of them require significant mathematics or science preparation to successfully compete for a job,” said Jennifer Caracciolo, school system spokeswoman.