Sesame Street

Sesame Street 'is a long-running American children's television series created by Joan Ganz Cooney and Lloyd Morrisett. The program is known for its educational content, and images communicated through the use of Jim Henson's Muppets, animation, short films, humor, and cultural references. The series premiered on November 10, 1969, to positive reviews, some controversy, and high viewership; it has aired on the U.S.'s national public television provider (PBS) since its debut, with its first run moving to premium channel HBO beginning in 2015.'

The show has undergone significant changes throughout its history. The format of Sesame Street consists of a combination of commercial television production elements and techniques which have evolved to reflect the changes in American culture and the audience's viewing habits. With the creation of Sesame Street, producers and writers of a children's television show used, for the first time, educational goals and a curriculum to shape its content. It was also the first time a show's educational effects on young children were studied.

Shortly after creating Sesame Street, its producers developed what came to be called the "CTW model" (named for the show's production company, the Children's Television Workshop), a system of television show planning, production, and evaluation based on collaborations between producers, writers, educators, and researchers. The show was initially funded by government and private foundations but has become somewhat self-supporting due to revenues from licensing arrangements, international sales, and other media. By 2006, there were independently produced versions, or "co-productions", of Sesame Street broadcast in twenty countries. In 2001 there were over 120 million viewers of various international versions of Sesame Street, and by the show's 40th anniversary in 2009, it was broadcast in more than 140 countries.

By its 40th anniversary in 2009, Sesame Street was the fifteenth-highest rated children's television show in the United States. A 1996 survey found that 95% of all American preschoolers had watched the show by the time they were three years old. In 2008, it was estimated that 77 million Americans had watched the series as children. As of 2014, Sesame Street has won 159 Emmy Awards and 8 Grammy Awards—more than any other children's show.

History
Main article: History of Sesame Street 

Sesame Street was conceived in 1966 during discussions between television producer Joan Ganz Cooney and Carnegie Foundation vice president Lloyd Morrisett. Their goal was to create a children's television show that would "master the addictive qualities of television and do something good with them", such as helping young children prepare for school. After two years of research the newly formed Children's Television Workshop (CTW) received a combined grant of US$8 million ($51 million in 2015 dollars) from the Carnegie Foundation, the Ford Foundation, and the U.S. Federal Government to create and produce a new children's television show. The program premiered on public television stations on November 10, 1969. It was the first preschool educational television program to base its contents and production values on laboratory and formative research. 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 international versions had been produced. Sesame Street has evolved from its initial inception. According to writer Michael Davis, by the mid-1970s the show had become "an American institution". The cast and crew expanded during this time, with emphasis on the hiring of women crew members and the addition of minorities to the cast. The show's success continued

into the 1980s. In 1981, when the federal government withdrew its funding, CTW turned to, and expanded, other revenue sources, including its magazine division, book royalties, product licensing, and foreign broadcast income. Sesame Street's curriculum has expanded to include more affective topics such as relationships, ethics, and emotions. Many of the show's storylines were taken from the experiences of its writing staff, cast, and crew, most notably, the 1982 death of Will Lee—who played Mr. Hooper—and the marriage of Luis and Maria in 1988.

In recent years Sesame Street has faced societal and economic challenges, including changes in viewing habits of young children, competition from other shows, the development of cable television, and a drop in ratings. After the turn of the 21st century, Sesame Street made major structural changes. For example, starting in 2002, its format became more narrative and included ongoing storylines. After its thirtieth anniversary in 1999 and due to the popularity of the Muppet Elmo, the show also incorporated a popular segment known as "Elmo's World". Upon its fortieth anniversary in 2009, the show received a Lifetime Achievement Emmy at the 36th Daytime Emmy Awards.

On August 13, 2015, as part of a five-year programming and development deal, Sesame Workshop announced that first-run episodes of Sesame Street would move to premium television service HBO in late 2015. HBO will hold first-run rights to all newer episodes of the series staring with season 46, after which they will air on PBS member stations following a nine-month exclusivity window, with no charge to the stations for airing the content. The agreement also gives HBO exclusive rights to stream past and future Sesame Street episodes on HBO Go and HBO Now – assuming those rights from Amazon Instant Video and Netflix; on August 14, Sesame Workshop announced that it would phase out its in-house subscription streaming service, Sesame Go, as a standalone service; the service will remain in operation, likely with its offerings reduced to a slate content available for free or serving as a portal for Sesame Street‍ '​s website. The deal came in the wake of cutbacks that had affected the series in recent years, the changing viewer habits of American children in the previous ten years, and Sesame Workshop's dependence upon revenue from DVD sales.