Teacher educators may have different views on what constitutes knowledge base for teacher education. Most of them, however, would agree that field experiences are indispensable for shaping and maintaining high-quality teachers. Unlike teacher training courses in the UK and US, fieldwork components are not always an option in Taiwan. This study, therefore, investigated the effects of a language teacher training course that integrated fieldwork components with traditional lectures. Both quantitative and qualitative data were collected from 13 participants. Results indicate that field-based components help prospective foreign language teachers to become reflective of their weaknesses and strengths and enhance their teacher efficacy.