Censorship: Be Prepared for Challenges
Although it might seem like a problem of the past, challenging books continues to be an issue libraries and schools experience regularly. In fact, every year the American Library Association (ALA) releases the top ten list of most frequently challenged books.
Because this is a common occurrence, making sure you are prepared to deal with a challenge to materials is important. The ALA has an abundance of information available from their Office for Intellectual Freedom. The National Coalition Against Censorship (NCAC) is another rich source of information. 
The NCAC provides collections of materials on the topic of censorship in schools for use by students, educators and parents everywhere.
For more information on censorship and challenges, as well as on Banned Books week (that happens each fall) visit the ALA's Banned & Challenged Books site.