The teacher is at fault.
He has given these classes before and knows the kinds of students he gets and their needs. He should be refering them to basic computer classes at the local library on the first day.
and π€¬at the teacher, I know for most these older people it's not innate inability it's extreme inexperience and nervousness. They think it's going to be really hard, they think they will make mistakes and "break" things. People like the teacher do not help.
I am reminded of Pauline at the Job Centre https://www.youtube.com/watch?v=Or6CwOyx30I