Here are some suggestions from Rachel Mork's Effective Teamwork in 11 Easy Steps:
1. Share Added Value
Establish a baseline level of respect and admiration within your team. Set up meetings where the overall purpose of the team is discussed. Focus on what added value each person brings.
2. Build Respect
Each student share what he/she brings to the team. Everyone shares what parts of the project appeal to their individual strengths. Discuss how the team works well together, along with what areas could use improvement.
3. Brainstorm Ideas as A Group
Make some time in your meetings for brainstorming. Allow everyone in the group to contribute ideas for streamlining efficiency, improving the workflow process, or any other area of concern that might arise.
4. Establish A Neutral Procedure To Deal With Conflict
Make sure you've established a clear, safe procedure for conflict resolution and complaints. Everyone in the group needs to know that dissatisfaction will be addressed, and problems solved to the best of your team's ability.
5. Schedule Progress Meetings
Don't let too much time pass as the project progresses. Make sure you hold meetings where concerns and developments can be discussed as a group, allowing all voices to be heard. The point of these meetings should be to deal with conflict, smooth out bumps in the process, and allow team members to voice concerns.