...a teacher not wearing a mask in the classroom.

With all the fear about the virus going around, everyone needs to wear a face mask. 100 per cent of the students in my class were wearing one during the last in-class lesson I had. Is a mask something like a hat that one might remove during the lesson? I don't think so.  I have a box of face masks - we bought some just before all the shops sold all their stock overnight. My wife suggested wearing a mask. It was already in my mind. Somehow or other, creative writing delivered through a mask seemed to send the wrong message in the past, but now it is quite normal and must be done. For a Maths teacher, however - no problem. This is a subject which is masked in mystery anyway.