Though the government cannot make laws censoring speech, the government including the Douglas County school board, and public libraries, can often choose what kind of speech to promote. In fact, choose they must. A public library with limited funds cannot possibly buy all published books. Deciding that a book on Madonna has less value to patrons than a book on roses is an exercise in judgment, not censorship. Since children spend limited time in school and human knowledge is vast, school boards must choose what to teach.
Good schools have detailed curricula.
They specify the subjects that will be taught in each class, the order in which they will be taught, how they will be taught, and the time that will be devoted to each. This minimizes repetition from grade to grade, ensures that important subjects receive adequate attention, and provides for an orderly progression through the school years. A school with a flabby curriculum characterized by windy goals, poor teacher choice, and deficient detail is the sort in which elementary school children end up reading The Wind in the Willows three times in three different grades and never do learn their multiplication tables. Telling teachers what to teach, and how they will do it, is a sign of professionalism, not an insult to it. Heedless of the difference between an Oliver Stone movie and history, they present themselves as champions of broadminded openness.