Cases refers in this title to written judicial opinions, in which are to be found the reasons given by judges for the application of law to a dispute
Legal education in the United States has been based for over a century on studying judicial decisions recorded by state and federal courts. In most instances the decisions, or cases, used for study are rendered by the appellate courts (courts of appeals, supreme courts) since these form a body of law known as the 'common law,' and serve as precedents for future cases. The cases in this text are abbreviated versions of actually decisions and are overshadowed in the text by the 'commentary.' In Law school text, the cases form the substance of the text and commentary is largely concerned with footnotes and annotations to the cases.
The casebook method of teaching the law was started in the 1880 by Dean Langdell of Harvard Law School, who felt that the method of expounding on the law through erudite lectures was an ineffective way of training lawyers. He collected numerous cases on on contracts in a casebook, which has served as a model to this day, notwithstanding many critics of this method.