The U.S. Constitution is a plan for government. Once the Constitution was ratified, it was the job of the first Congress to use this plan to organize the new government. In this lesson, you will read about some of the decisions made by the first Congress. You will learn how Congress organized the executive branch. You will also learn how Congress established a system of federal courts below the U.S. Supreme Court. Finally, you will learn how the Bill of Rights was added to the Constitution.