The key players in special education are all those in which the student currently has contact and those that he/she may benefit from having contact.  This includes his/her family members (could include mother, father, brother/sister, grandparent, cousin, etc.), general education teacher, special education teacher, guidance counselor, a school district representative (to approve school resources that may come about during the meeting), the student him or herself, occupational therapist, speech and language therapist, a trusted adult outside of school, behavior therapist, psychologist, social worker, principal, pastor, rabbi, tutor, trusted friend, etc.  Anyone that may have a contributing perspective is a valuable key player in the collaboration process.