The signing of the Constitution took place on September 17, 1787 at the Pennsylvania State House (Independence Hall), Philadelphia, Pennsylvania. The Preamble to the U.S. Constitution:
We the people of the United States, in order to form a more perfect union, establish justice, insure domestic tranquility, provide for the common defense, promote the general welfare, and secure the blessings of liberty to ourselves and our posterity, do ordain and establish this Constitution for the United States of America.
The U.S. Constitution (Lee Ann Caldwell, Center for the Study of Georgia History)
Georgia and the U.S. Constitution (Lee Ann Caldwell, Center for the Study of Georgia History)
A More Perfect Union: The Creation of the U.S. Constitution (National Archives and Records Administration)
The Constitution of the United States: A Transcription (National Archives and Records Administration)
The Preamble to the Bill of Rights and the Bill of Rights: A Transcription (National Archives and Records Administration). The Bill of Rights are the first Ten Amendments to the U.S. Constitution.
U.S. Constitution – Primary Documents in American History (Library of Congress)
Constitution of the United States – Questions & Answers (National Archives and Records Administration)
Interactive Constitution (National Constitution Center) – read interpretations of the document by searching keywords or selecting topics or famous Supreme Court decisions.
National Constitution Day (National Endowment for the Humanities)
U.S. Constitution: Amendments 11–27 [the amendments after the Bill of Rights] (National Archives and Records Administration)
James Madison and the Federal Constitutional Convention of 1787 (Library of Congress)
Documents from the Continental Congress and the Constitutional Convention (Library of Congress)
Legal Concepts (Landmark Cases of the Supreme Court)
Annenberg Guide to the United States Constitution (Annenberg Public Policy Center)
*36 USCS § 106; Aug. 12, 1998, P.L. 105-225, §1,112 Stat. 1255; as amended Dec. 8, 2004, P.L. 108-447, Div J, Title I, § 111(c)(1), 118 Stat. 3344); "Notice of Implementation of Constitution Day and Citizenship Day on September 17 of Each Year," 70 Fed. Reg. 29727 (May 24, 2005)
Partial sources: Garvin, Peggy. The Government Domain: Back to School for Constitution Day 2008 and the Law Library of Congress (both accessed August 15, 2011).