This study examined the effects of audio and video self-recording on preservice teachers' written reflections. Participants (n = 201) came from a secondary teaching methods course and its school-based (clinical) fieldwork. The audio group (n[subscript A] = 106) used audio recorders to monitor their teaching in fieldwork placements; the video group (n[subscript V] = 95) used video recorders. Qualitative methods (content analysis) of the reflections found that preservice teachers gave varied attention to curricular decisions, question/response patterns, wait time, mannerisms, nervousness, and use of praise. Quantitative analyses (chi-square tests for independence) indicate the recording format did not lead to significant differences in participants' reflection on their various instructional behaviors except for two aspects: the video group gave more attention to non-verbal behaviors and movement around the classroom (a = 0.05). Implications are discussed, including methods for enhancing the habit of teachers recording and reflecting in teacher education.