The purpose of this study was to help public school administrators, especially principals, to understand the legal and constitutional limitations of their authority in dealing with students. Control of students is discussed as five separate topics, each representing a chapter, as follows: (1) freedom of expression and First Amendment rights; (2) the constitutionality of dress and hair style codes; (3) due process and suspension and expulsion; (4) the constitutionality of searches and seizures; and (5) the rights of the married or pregnant student. Two student rights cases--Tinker v. Des Moines Independent Community School District and Goss v. Lopez--are discussed in detail. The study concludes that public school administrators must respect the civil rights of all students as specified in the Constitution. (Author/LD)