Texas State Board of Education Chairwoman Barbara Cargill, who spoke at the 2013 Iditarod Winter Conference for Educators in Alaska, recently learned firsthand about dog-sled racing and the potential it holds for teaching students about subjects from science to geography. The Iditarod website offers free lessons for various subjects. "Each sled has a GPS device and students can log in and pull up Iditarod Race information on a master computer where they can follow their favorite musher or favorite sled dog," Cargill said.