I am a semi retired school teacher
I hope that you had a satisfying career. I understand teaching is no picnic in this day and age.
it is not, and by being semi retired, I just fill in like the substitute, which is almost worse at least I have reduced my work hours
Yes, but the children respect you less and expect that you will just play a movie instead of teaching them anything.  Now i feel sorry for you.
well retirement is coming, speaking of that retirement is a recent thing only introduced in the late 19th century early 20th century