Go further than that and divide it by the number of hours the teacher’s work per week. Then remember that teachers ( where I live get two teachers’s days off per month plus several half days for teacher prep and no longer have to work bus duty or recess duty.
Back in 1971, the NEA, meeting in Philadelphia, hired Saul Alinsky to do their union organizing for them. He changed the goal of the NEA, from providing the best education possible for each child, to teacher pay and tenure. The quality of public school education has been on a decline ever since. It is a statistically provable fact.
My wife said those "teacher prep" days are another example of fraud. She actually dreaded most of the "early release days" and "teacher workdays" since the time was burned away with the most boring, meaningless, mandatory training sessions.
See Post 49 in this thread.
We lived in Hawaii in the early 70s, while my Dad was stationed there.
The teachers went on strike for a whole month. Now of course, we loved it! Most of my teachers were women of Japanese heritage (had the biggest schoolboy crush on one of them).
k-12 Public education is one of the biggest failures of government and it receives almost no attention.