As a product of judicial rulings on the legality of acts of educational authorities and on the constitutionality of educational legislation, the common law authoritatively constrains the actions of school officials. Courts have recently delineated general boundaries in two important areas of school law: (1) Tort liability of school districts, and (2) civil liberties of pupils. The school district's traditional immunity to tort liability and the ability of school officials to enact and enforce reasonable rules and regulations governing the conduct of pupils have been redefined by judicial decisions. Although these decisions have left some specific questions unanswered, school administrators must understand the principles of law that the courts have enunciated, and attempt to keep abreast of the changes in school law likely to be announced by the courts in the near future. (JH)