It’s looking more and more like the story is nonsense. According to the actual complaint filed, the principal did not ban the Declaration of Independence, but told him he could not hand out a list of excerpts and quotations that included one excerpt from the Declaration. Apparently what the teacher did was find as many excerpts as he could that referred to God and handed them out to his students, the type of absurd list put together by Christian Nation apologists like David Barton. Seeing the Forest has been following this story and has links to all the others who have been following it as well. Also see the information from Liz Ditz and Majikthise.