By 1966, increasing enrollment required another junior high school building in Marticville. This $2.5 million building was dedicated in 1968 and designated as a middle school, housing grades 6–8. The Millersville Junior High was also reorganized as a middle school. The ninth grade remained in the high school, where a four classroom portable building was added. Millersville Middle School became a ninth grade building, and the high school housed grades 10–12. Students routinely crossed the parking tiers to change classes between buildings. As the district population continued to grow, the Penn Manor School Board found it necessary to add a second middle school in the northern end of the district. After acquiring 50 acres of land from the John G. Herr farm at the intersection of Charlestown Road and Ironstone Ridge Road, Manor Middle School was completed in 1994.