Watching a colleague teach — and being watched — is one of the best ways to grow. Four short lessons on doing it well, then a self-check.
Peer observation works when it's safe: separate from appraisal, reciprocal, and owned by the person being observed.
A good observation starts before the class. Agree what to look for, and get the context, so feedback is useful and welcome.
Useful observation describes what happened — specific, evidence-based — rather than rushing to judgement.
The debrief is the point. Make it a dialogue that starts from the colleague's own reflection.