  We discuss three proof evaluation activities meant to promote the acquisition
of sociomathematical skills in an introductory undergraduate proof-writing
course. Sociomathematical norms include meta-mathematical learning behaviors of
professional mathematics, for example the ability to read and discuss
mathematics critically, reach a consensus on correctness and clarity as a
group, and verbalize what qualities ``good" proofs possess. The first of these
activities involves peer review, the second focuses on evaluating the quality
of internet resources, and the third emphasizes the progression of proof ideas
and the brainstorm-sketch-revise process of professional mathematics. All three
of the activities involve groupwork and meta-mathematical discussion questions
to develop students' sociomathematical skills.
