Gwinnett County's Chattahoochee Elementary School claimed a $15,000 prize Monday from a recent contest aimed at helping schools with technology and other equipment. More than 1,000 schools in the U.S. and Canada entered, and Chattahoochee was one of three winners. The school received a check from Steve Gornall, owner of Cartridge World in Johns Creek, at a surprise faculty meeting. The money is slated to buy cameras for additional safety and security around the school, as well as to add technology that can boost student engagement and achievement.