Analyzing student presentations from three perspectives—expert, peer, and self—provides extended feedback and opportunities to learn. All three of these are helpful and serve different purposes. The expert (teacher) feedback shows how the teacher views student work and often assigns a grade. Peer analysis provides students doing the analysis an opportunity to determine what makes the most difference in clarity of science, interest in examples, or quality of work; while providing students receiving the feedback with different perspectives to consider. Self-assessment encourages critical-thinking analysis and improvement (NRC 1996).