Think about the standards you want to uphold as a team. What will promote a productive, positive professional environment? What will promote a hostile work environment? The standards you adopt can make the difference between Google and Apple, for example.
Members of the team are expected to be good citizens and to engage in responsible behaviors that reflect well upon themselves, their team, and their cohort of peers; to be civil to one another and to others in their campus community; and to contribute positively to the team project, common classes, and overall student and university life.