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Cornell Law’s Legal Information Institute (LII) offers free, searchable primary legal materials—such as Supreme Court opinions, the U.S. Code, the Code of Federal Regulations, and the Constitution—and practical legal-research guides and tutorials for students and researchers.
More resources on Legal Research
Caselaw Access Project
A free digitized collection of over 6.7 million U.S. court decisions spanning more than 360 years, compiled from Harvard Law School's library, offering searchable full-text access to historical and modern published case law.
Google Scholar (Legal)
A free search engine covering U.S. and international case law, court opinions, and legal journals, letting users search by citation, keyword, or court, and track how later cases cite a given opinion.
CourtListener
A free legal database run by the nonprofit Free Law Project, providing millions of court opinions, oral argument recordings, and PACER docket alerts, used by practitioners as a low-cost alternative to paid research tools.
Legal Research Fundamentals
Master legal research! This Quimbee course covers essential skills for finding and analyzing legal information effectively.
Legal Research Lessons
Master legal-research skills with lessons from various faculty! Explore statutes, case law, and secondary sources.
Legal Research in a Nutshell
A concise guide to legal research methodology covering primary and secondary sources, online databases, legislative history, administrative law, and international and comparative law research, written for law students and practicing attorneys.