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\section{Innovations in AST 208}  \subsection{Collaborative work}  Throughout the semester, students work in teams of 3--4. These teams, which persist throughout the semester, are assigned during the second week based on responses to an online questionnaire using (\catme). (\catme)\cite{Ohland_2012}.  Of the lab grade, 15\% is determined by peer and self assessment on \catme\ and by participation, as observed by the instructor. The students periodically receive a link to a \catme\ peer evaluation form, in which they assess their team's work on recent labs. The goals of this peer assessment are 1) to stress the importance of being a patient, generous, and hard-working collaborator; 2) to think critically about one's own work and to measure that work against one's own expectations; and 3) to encourage all team members to contribute equally.