The U.S. Constitution is the foundation of U.S. law.

It creates the structure of the federal government.

Three branches: Legislative, Executive, Judicial.

The Preamble explains the goals of the Constitution.

The Bill of Rights lists 10 important freedoms.

There are 27 amendments in total.

Checks and balances prevent any one branch from gaining too much power.

It guarantees citizens rights like free speech and fair trials.

The Constitution can be amended as society changes.

It remains a model for democracy around the world.