The Warren County School System is looking to expand its Mechatronics program into elementary schools using a $100,000 mobile STEM classroom.STEM is an acronym for science, technology, engineering, and math, and it can be used by elementary schools, says Director of Schools Bobby Cox. “Tracy Risinger, our Career and Technical Education director, obtained a grant to expand the Mechatronics program we have at the high school down into the middle schools,” he said. “It would be a traveling trailer, for lack of a better term.