Abstract: There are two approaches to teacher development. The reflective approach to teacher development requires teachers to think about questions in teaching and allow the teachers to develop through critical thinking. On the contrary, the nonreflective approach to teacher development doesn’t require teachers to think about questions in teaching and allow the teachers to develop through nonrational thinking. The nonreflective approach to teacher development tends to be ignored or underestimated because of the rational epistemology and the consequent conceptualization of teacher professional development. The patterns of nonreflective approaches include tacit doubting, implicit learning, etc.

Key words: teacher development, teacher professional development, reflection of teacher, tacit doubting