Last year, lawmakers passed legislation requiring a moment of silence at the start of each school day. Atheist activist Rob Sherman challenged the law on his daughter's behalf. The judge previously put a ban in place at her school. He ruled it temporarily applies to all school districts in the state.
"What will happen now is that the judge will consider all of the proof and all of the arguments and at some point in the future issue a final ruling on whether or not the state statue violates the U.S. Constitution," said Adam Schwartz, Illinois ACLU.
After the law went into effect, some lawmakers tried to reverse it. But that move failed in the state senate. Some senators want the court challenge to be decided before taking any action.