U. S. History textbook (written verison of the Constitution and Amendments)

http://www.house.gov/house/Educat.html
The house.gov website lists the amendments as written.  Click on Bill of Rights for the first ten amendments.  From this page you can link to the remaining amendments by clicking on "other amendments" at the top of the page.

http://www.archives.gov/exhibit_hall/charters_of_freedom/constitution/constitution_q_and_a.html

This provides questions and answers regarding the constitution.