1. Findlaw's U. S. Supreme Court Center, is full of basic information and lots of links about the Court.

2. The Constitution of the United States: Analysis and Interpretation

This is a product of the Congressional Research Service of the US Library of Congress. It contains the basic document, annotations, analytical text, and a search engine for the all of the texts in the site

This includes both a simple introductory text and a selection of useful links.

This is a pretty good presentation of sources from the University of Chicago, but it is clearly a comparative law oriented presentation, with only a small portion devoted to the United States Constitution.

This site is included as an example of a type of material which has become relatively common on the Internet and which can trip up the unwary internet "surfer". While it appears straightforward, it is in fact a non-mainstream right wing presentation of contitutional issues, "facts", event schedules, etc.