Most professors appreciate a student's extra efforts and attempts to improve. Faculty members will participate in study groups based on their own preference. They are not the necessary component of a successful study group. It will be up to members of the study groups to maintain contact with the instructor of the course regarding the material studied by the group, should questions arise. The duration of a study group session will depend on the topic and need.
Study groups are flexible.
Some students may choose to join a study group exclusively for test preparation. How the groups will be conducted will be determined by each individual group. Some groups may choose to meet only before a test for a quick review. The goal is to accommodate everyone. How often a group convenes is up to the individual group.