This is not about censorship.  This is about all of those involved in raising and educating minors working together in the interests of their positive growth and development. 

In fact, I'm not sure why so many teachers are opposed to letting parents know what they intend to cover.  It would seem to me that it would be an advantage for parents to have the opportunity to review the syllabus so that some of the major works that their children are studying can be discussed at home.  The National Education Association website cites a 2002 study that found that "[w]hen schools, families, and community groups work together to support learning, children tend to do better in school, stay in school longer, and like school more." NEA Clearly, there is a direct, positive correlation between parental involvement and student performance.  Opposition to this measure from teachers makes me wonder whether they feel that they are either above scrutiny, or unlikely to be able to make the case for their curriculum choices. Neither option is satisfactory.