At the center of Tuesday's case is the school system in Montgomery County, Md., the most religiously diverse county in the United States, with 160,000 students of almost all faiths. The school board approved five storybooks with LGBTQ+ characters for use in elementary school classes. The avowed purpose was to teach students tolerance and respect for LGBTQ+ students and parents. But some parents objected, contending that exposure to the approved materials conflicted with their religious beliefs.