Hell. The majority of the 'teachers' these days have no clue how to do any of these things. Most kids cannot read and write.
My niece did high school through home study, reporting to a 'teacher' once a week. When she had a question on her 10th grade math, he said to her that he 'did not know and can't she go home and ask her dad.'
That was a couple of decades ago. I can only imagine how much worse it is now. . . .