The Supreme Court is the highest court in the United States, with the final say on what laws mean and whether they follow the Constitution. When lower courts disagree about a law, or when someone believes a law violates the Constitution, the case can eventually reach the Supreme Court. Whatever the Supreme Court decides becomes the law of the land, unless the Constitution is later changed or the Court changes its own interpretation.

Nine justices serve on the Supreme Court, and they're appointed by the President and confirmed by the Senate. Unlike elected officials who serve fixed terms, Supreme Court justices serve for life (or until they choose to retire or are removed). This means their decisions can shape American law for decades. The Court hears cases about everything from free speech to voting rights to how police can conduct searches.

The Supreme Court doesn't decide every case that comes to it. Each year, thousands of people ask the Court to hear their cases, but the justices choose only about 80 cases to review, picking the ones that will resolve important questions or conflicts in how laws are being interpreted.

Famous Supreme Court decisions have changed American history: Brown v. Board of Education ended legal school segregation, while Miranda v. Arizona helped establish the Miranda rights you hear police read on TV shows. When the Supreme Court speaks, the whole country listens, because its rulings affect how we live, work, and interact with each other under the law.