A course in semiotics developed and taught for 16 years at Brookline High School in Massachusetts is described. The course uses four published texts, a series of readings, experiments, language games, and exercises in an effort to broaden, objectify, and integrate the students' conception of language. It consists of four units: (1) signs, language, and reality; (2) communication in man and beast; (3) communication, codes and culture; and (4) language in the making, or theories of the origin of language. Students are evaluated according to the level of thinking about language expressed in writing by the student, based on a theory of five levels of understanding, as well as by the usual methods of evaluation: tests, quizzes, and papers. A comparison of the levels of student understanding at the beginning and end of the course with non-participants' understanding levels at the beginning and end of a standard English course revealed an average increase of 1.05 levels in the first group and of .05 level in the second. Through a grant, two dozen teachers have been trained and the course installed in ten high schools in the greater Boston area. (MSE)