Raise the bar: This is the final peer review in the investigation (although the science seminar is a kind of peer review). Call on students to dig down, support, and hold each other accountable for scientific thinking and discourse. Revisit purpose of peer review and scientific argument – to get to the bottom of things. Revisit talk stems that may help. Invite students to read the science talk stems and locate stems that might be useful. Revisit Criteria for Scientific Models to identify what standards they are holding each other to.