Why is mr freeman in trouble with the school board in speak?

In "Speak" by Laurie Halse Anderson, Mr. Freeman, the art teacher, gets into trouble with the school board due to his unorthodox teaching methods and the controversial nature of his art assignments. He encourages students to express themselves openly, which some parents and administrators view as inappropriate. Additionally, his support for the protagonist, Melinda, as she deals with her trauma, draws scrutiny, leading to tension with the school board.