District courts are the lowest in the federal court system. They are trial courts and the entry point for most legal proceedings in the federal court system. Districts in this case are groups of states, and each state has at least one district court. Circuit Courts of Appeals are the middle rank; they review decisions from lower courts (District courts) trying to pass the case to the Supreme Court. They can affirm (yea sounds right), vacate (erase; never happened; void), reverse (undo ruling but it still goes on record), or remand (send back) lower courts' rulings The Supreme Court, or SCOTUS, sets its own agenda and is the highest legal court in all the land. It has nine judges, or justices, and only hears out about 1-5% of the requests submitted to it. Its original jurisdiction is limited to cases affecting ambassadors and other public ministers/consuls and those including a state as a side/party of the case