"Bernice Bobs Her Hair" was made into a short TV production by PBS in 1976. It was directed by Joan Micklin Silver and starred Shelley Duvall as Bernice, Veronica Cartwright as Marjorie, and Bud Cort as Warren.
A clip of Marjorie giving "lessons" to Bernice:
The New York Times Review of the film is available here.
