The American Library Association put out a statement on November 29, 2021, about book challenges. It can be found here. It references the Freedom to Read statement, which was written in 1953, and can be found here.
Having a strong collection development policy and book challenge policy will help protect school librarians and their book purchasing decisions. ALA provides resources for creating either of those here.
Dr. April Dawkins provided an informative, timely session on book challenges and that information can be found on the Members-Only Advocacy page. We highly recommend you watch it if you haven't already and look over the included resources.
If books in your collection have been challenged, please reach out and we will connect you with any available resources we have. Posting in the NCSLMA School Librarians Facebook Group is the fastest way to get an answer, but you can also e-mail Board members. Their information is posted here.