There have been 27 amendments to the United States Constitution. The first 10 amendments are known as the Bill of Rights and were ratified on December 15, 1791. The remaining 17 amendments were ratified at various times throughout history. Here is a summary of all 27 amendments:

1. Freedom of religion, speech, press, assembly, and petition.
2. Right to bear arms.
3. Citizens do not have to house soldiers.
4. No unreasonable search or arrest.
5. No double jeopardy or no witness against yourself.
6. The right to a speedy and public trial.
7. The right to a jury trial in civil matters of $20 and over.
8. No excessive bail or cruel punishment.
9. People get rights not listed in Constitution.
10. Any rights not given to federal government are given to the states and people.
11. Individual cannot sue a state in a federal court.
12. Separate ballots for President and Vice President.
13. Abolish slavery.
14. If you are born or naturalized in the U.S. then you are a citizen of the U.S.
15. You cannot prevent a person from voting because of race, color, or creed.
16. Income tax.
17. Popular election of U.S. Senators.
18. Prohibition.
19. Women get the right to vote.
20. President takes office on January 20th instead of March 4th.
21. Repeal of prohibition of alcohol.
22. Limits the terms Presidents can serve.
23. Washington D.C. residents can vote for president.
24. Anti-poll tax.
25. Lays down the rules for who becomes president if the president is unable to serve.
26. The minimum voting age is 18.
27. Congress cannot get a pay raise until the next term.

Note that the 13th, 14th, and 15th amendments are collectively known as the Reconstruction Amendments.