...get started in Westlaw:
...tell if a case, statute, or regulation is still "good law":
This website provides and maintains the full text of the constitution annotated with Supreme Court decisions, the U.S. Code, and more that is available through the Congressional Research Service. Provided by the Legal Information Institute.
A team of Cornell Law students craft these Supreme Court Bulletin Previews, covering every case on the docket. Their goal is to provide you with objective summaries of the issues and arguments pertinent to each case the Supreme Court hears, and to do so in straightforward language.
Ballotpedia is the digital encyclopedia of American politics and elections. Provides highlights, background, outcomes and more on historic SCOTUS cases and cases by term.
A blog about the Supreme Court of the United States written by lawyers, law professors, and law students. Includes additional tools and resources for following the activities of the Supreme Court.