High Quality Content by WIKIPEDIA articles! The preschool educational television program Sesame Street has aired on public broadcasting television stations since its premiere on November 10, 1969. Featuring Jim Henson`s Muppets, animation, live shorts, humor, and celebrity appearances, it was the first television program of its kind to base its contents and production values on laboratory and formative research, and the first to include a curriculum "detailed or stated in terms of measurable outcomes". Initial responses to the show included adulatory reviews, some controversy, and high ratings. By its 40th anniversary in 2009, Sesame Street was broadcast in over 120 countries, and 20 independent international versions had been produced.