This document provides guidance for writing objective summaries, or "key messages", after observing a teaching session. It advises that key messages should:
1) Focus on the impact on learner experience and learning outcomes, not just teaching processes.
2) Use evaluative words to indicate the extent or quality of learning.
3) Cite specific evidence from the observation to support claims about learning.
4) Consider quantifying observations in terms of time, number of learners, or progress over time when possible.