Using a rubric, this tool allows students to assess their own performance on a group project as well as to assess the performances of the groups members. Thank you, Hawk from a Handsaw.
Here is the top level of the rubric:
_____ (5) You were consistently prepared, more than pulled your weight, and consistently contributed. The quantity and quality of your contribution were clearly top shelf. You were always on task and willing to work outside of class if needed.