The document defines a team as a group working together towards a common goal, and teamwork as effective cooperation and communication. It states that teamwork is important as it improves the work environment, keeps communication consistent, relieves stress, reduces errors, promotes feedback, and makes everyone responsible for outcomes. Effective team members are supportive, open, share information and ideas, and don't blame others. Guidelines for effective membership include listening, sharing information, asking questions, participating fully, and really listening to other members.