I was in school in Wisconsin when they got rid of the teachers union; schooling improved drastically.

[citation needed]

There are all sorts of folks saying all sorts of things on the topic. Right wing publications have said it's been great:

* https://www.city-journal.org/article/wisconsin-act-10-consti...

Others are saying it reduced test scores:

* https://www.sciencedirect.com/science/article/abs/pii/S02727...