This report presents a statistical analysis of the frequency of teacher misassignment, with some emphasis on science, bilingual, and computer science teachers. The data were collected on the Public School Teachers Questionnaire, one of seven questionnaires in the Schools and Staffing Survey (SASS), developed by the National Center for Education Statistics and conducted by the U.S. Bureau of the Census. Four categories of qualification were derived from the data provided by the teachers. The first category of qualification indicated that the teacher had majored in the subject at the bachelor's degree level or higher and that the teacher was certified to teach the subject. The second category indicated that the teacher had majored in the subject but was not certified to teach the subject. The third category indicated that the teacher had not majored in the subject but was certified to teach the subject. And the fourth category indicated that the teacher had neither majored in the subject nor was certified to teach it. Resulting data from the survey are displayed on seven tables, a narrative analysis of the results is presented, and several questions for further research are suggested. (JD)