Schoolhouse Rock! is an American interstitial programming series of animated musical educational short films (and later, music videos) which aired during the Saturday morning children's programming block on the U.S. television network ABC. The themes covered included grammar, science, economics, history, mathematics, and civics. The series' original run lasted from 1973 to 1985; it was later revived from 1993 to 1996. Additional episodes were produced in 2009 for direct-to-video release.