/*
         * Pre:
         * Post: If the current user is a teacher, the teacher dropdown
         *       should only show the current user
         */
        private void loadTeacherDropdown()
        {
            if (HighestPermissionTeacher())
            {
                User    user    = (User)Session[Utility.userRole];
                Contact contact = DbInterfaceContact.GetContact(user.contactId);

                if (contact != null)
                {
                    ddlTeacher.Items.Add(new ListItem(contact.lastName + ", " + contact.firstName, user.contactId.ToString()));
                }
            }
        }