Faculty should not cancel class unless there is a dire emergency. Instead, faculty should create contingency plans to have the classroom led by a suitable substitute in case they become sick or need to travel unexpectedly.
A suitable substitute is eligible to provide or oversee instruction to students. A suitable substitute can be another faculty member, a TA, or a guest speaker. A suitable substitute cannot be an undergraduate Learning Assistant (LA). A master’s Instructional Assistant (IA) can be a suitable substitute, with one exception: they cannot be asked to deliver a lecture.
The following was communicated by the Vice Provost for Faculty Affairs, Dr. Kathleen Bieschke:
"Faculty don’t cancel classes, Penn State cancels classes. If a faculty member can’t hold a class, the expectation is that instruction will occur in some other way (i.e., remote instruction, asynchronous activity, guest speaker, etc.). Generally, faculty should not cancel classes; if they do, they should let the academic unit know so that they can field questions. Certainly, there are times when a last-minute cancellation due to an emergency or illness is unavoidable, but faculty should have contingency plans in place should they have to miss a class."
If you need assistance arranging a suitable substitute, you should contact your Department Head.