United States Constitution. The Constitution was adopted on September 17, 1787, by the Constitutional Convention in Philadelphia, Pennsylvania, and ratified by conventions in eleven States.
It went into effect on March 4, 1789. Since the Constitution was adopted, it has been amended twenty-seven times. The first ten amendments (along with two others that were not ratified at the time) were proposed by Congress on September 25, 1789, and were ratified by the necessary three-fourths of the States on December 15, 1791. These first ten amendments are known as the Bill of Rights.
U.S. Constitution. Electoral College - Schoolhouse Rock School House Rock - Three Ring Government (America Rock) Constitution Rap Annotated Constitution Prototype TOC. The Bill of Rights (including the Preamble to the Bill of Rights)
Schoolhouse Rock- How a Bill Becomes a Law School House Rock Preamble School House Rock Preamble