Federalism describes the system of shared governance between national and state governments. The states and the federal government have both exclusive and concurrent powers, which help to explain the negotiation over the balance of power between them.
It's the former practice of segregating black people in the US.
I compound that student led prayers violate the first amendment because of the following reasons;The constitution guarantees freedoms of worship for everyone. In such prayers, not all students subscribe to the student faith. Those students are thus offended, and have their rights limited.
The USA constitution does not establish any religion as the official religion and separates the church and the state. public prayers in public gatherings goes against this spirit as it seeks to establish one religion dominance over the other and over the secularist of the state.