The problem of discipline has consistently headed the list of concerns of secondary education students enrolled in and graduated from Northern Arizona University's College of Education. To address this issue, the Lee Canter Model of Assertive Discipline was adopted in the preservice training program. This model calls for specific, observable rules (five or six maximum) introduced and explained by the teacher. A list of consequences, articulated by the teacher, becomes operative when students fail to observe the rules. A study sought to determine the extent to which preservice secondary education majors modified their attitudes toward classroom discipline after exposure to the Canter Model. Thirty-seven students participated in the study and responded to a pre- and post-questionnaire which measured changes in their attitudes toward discipline and confidence in dealing with high school students. An analysis of results indicated that the Canter Model is effective in improving attitudes and confidence. (JD)