Brookfield argues that critically reflective teaching requires focusing on a specific incident to uncover assumptions. He suggests using lenses to gain different perspectives, including: 1) reviewing one's experiences as a learner and teacher to see practice from students' views; 2) seeing oneself through students' eyes, which can reveal surprises but requires listening to feedback; 3) fostering critical conversations with colleagues to break isolation and find diversity of experiences; and 4) using theoretical literature to describe practice from multiple perspectives and understand links between personal and political aspects of teaching. These lenses help teachers adopt unfamiliar angles to re-examine practice.