This is the sixth in a series of biennial surveys of Texas public school teachers. It is part of a study, begun in 1980, to form a database of demographic information related to characteristics of Texas teachers. The results of the present survey are presented and analyzed. Information includes: (1) national data for teachers in 1976 and 1986; (2) characteristics of Texas public school teachers: 1980-1990; (3) teachers' reasons for leaving the profession; and (4) moonlighting jobs for teachers: 1980-1990. A copy of the questionnaire is appended as well as teacher comments from the 1990 survey. (JD)