Learning to teach - the learning is in the experience; common themes in learning to teach; the personal nature of teaching and learning experiences; voices from three weeks of teaching; voices from five weeks of teaching; sink or swim? voices of extended experiences, Members of the 1996 Queen's Waterloo Science Group; learning to teach - a story of five crises, Kevin Smith; finding my voice as critical friends - helping students find critical voices, Derek Featherstone and Grade 10 science students; voices of critical friends reflecting on teaching and learning experiences, Peter Chin et al.