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\section{Innovations}  \subsection{Collaborative \subsection{Encouragement of 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 the \catme\ \verb|Team-Maker| tool \cite{Layton_2010}.  Of the lab grade, 15\% is determined by peer and self assessment on \catme\ \citep{Loughry_2007,Ohland_2012,Loughry_2014} 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.