sentences:  The Madison City School System, formed in 1998, serves over 10,000 students from the city of Madison and town of Triana.As of 2012, the school system has seven elementary schools serving grades K-5 (Columbia Elementary School, Heritage Elementary School, Horizon Elementary School, Madison Elementary School, Mill Creek Elementary School, Rainbow Elementary School, and West Madison Elementary School), two middle schools serving grades 6-8 (Discovery Middle School, Liberty Middle School), and two high schools serving grades 9-12 (Bob Jones High School and James Clemens High School).Madison Elementary, built about 1936, is the oldest school in the system.