If you are sick or have a last-minute conflict and cannot make it to class, you should make every effort to let your students know the situation or arrange for a substitute. Email is a good tool for this. You should also let Darla Crawford or Liz Sullivan know so they can put a note on the classroom door.
The official Bloomington Faculty Council policy on attendance states:
“Faculty members teaching courses have the responsibility to provide instruction as scheduled. Variations from the schedule may occur for a variety of reasons, including illness, professional activities and pedagogical considerations. When such variations occur, it is the responsibility of the faculty member both to provide equivalent academic activity for the students in the course and to notify the chairperson of the department offering the course of the change in schedule.”