This collection of "cases and materials" is one version of what is commonly called a "cas" and is intended as a teaching aid in a process commonly called teaching by the "case method." It is first of all a portable library.It consists of extensively reproduced reports of law suits usually in the higher courts, but sometimes in the trial court.There are some less extensive excerpts. And there are some excerpts that can best be described as notes of reports.The word "materials" covers these lesser excerpts, but it also covers a variety of other "legal" things, sections of statutes, clauses from contracts, text notes, and questions and problems.