I have been tutoring one-on-one since my undergraduate days. At the university I tutored computer science to foreign students and a blind student. Due to my approach, my fellow tutors were not aware that he was indeed blind, until it was discussed in a staff meeting.
In my career as an IT manager, I tutored computer users, also on a one-on-one basis on the software used at each particular company. I have also tutored friends and family, which is much harder.
I have been tutoring, off a... ... More