The US Supreme Court will consider Tuesday whether it violates the Constitution for public elementary schools to use books with LGBTQ themes without letting parents opt out, in one of three cases this term that further tests the separation between religion and government.

Analysis: The cases — over a district’s opt-out policy and a religious charter school — could have ramifications for school systems nationwide.

The 6-3 conservative Supreme Court has sided with religious interests in every case it has considered in recent years – allowing a high school football coach to pray on the 50-yard line, permitting taxpayer money to be spent on religious schools and backing a Catholic foster care agency that refused to work with same-sex couples as potential parents.