On our institution we use to place a meeting in every part of term. Student enroll in each course designates a student which will represent the group and will bring to the meeting the issues presented by the the group. Usually the student presents the issues (teacher, academic, administrative etc.)that cause their insatisfaction. After the meeting all issues are revised and whenver possible actions are taken. For the next meeting we present information about the issues and what actions were taken. This a way to deal with the insatisfaction of student and they feel very pleased :-)because not only has a forum but claims are attended.