This document discusses five ways that the U.S. Constitution has been informally changed over time without formal amendments: 1) basic legislation passed by Congress that adds details to skeletal Constitutional provisions; 2) executive actions that have expanded presidential power; 3) court decisions where the Supreme Court interprets the Constitution; 4) party practices such as conventions that are not mentioned in the Constitution; and 5) customs that have become entrenched over time, such as the role of the Cabinet. It provides examples of how each method has altered the meaning or implementation of the Constitution in practice.