• LewisNational School of Excellence and Clark Middle School is one of two public middle schools in Jefferson City, MO, and the school home for approximately 950 students living in the Jefferson City Public School District. It sits on several acres of rolling hills in the east side of the city. About 65 full and part time staff members teach core, encore, and elective classes for middle level students. Opened in the school year 1993-94, the building is designed to house sixth, seventh, and eighth grade students with each grade level in its own wing.