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.

Shortly after creating Sesame Street, its producers began to develop what came to be called " the CTW model ", a system of planning, production, and evaluation that did not fully emerge until the end of the show's first season.

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