With current inclusion trends, teacher educators are challenged to redesign their programmes to prepare preservice teachers to educate a wide range of students in whole-class settings. This quantitative study examined the impact of an inclusion course and a field experience on preservice teachers' self-efficacy for teaching in inclusive classrooms. Based on data collected from 141 participants, the results indicated that both the inclusion course and the field experience produced significant gains in self-efficacy. Participants with prior experience with people with exceptional needs had significantly higher levels of self-efficacy than those without prior experience; however, both groups experienced significant gains after the course and the field experience. Also, the results showed that, during the field experience, as preservice teachers spent more time with direct, individual instruction with students with exceptional needs, and less time with observation and whole-class instruction, their self-efficacy was more likely to increase. Findings were discussed, and implications for practice and future research were suggested.