In Arizona (you know, where they're protesting) they have a MASSIVE teacher shortage. So much so that they'll let anybody with a college degree teach there, no actual training required, and they STILL can't fill a ton of openings.

https://www.washingtonpost.com/news/answer-sheet/wp/2017/05/14/in-arizona-teachers-can-now-be-hired-with-absolutely-no-training-in-how-to-teach/?utm_term=.517ab9b3f419

https://www.azcentral.com/story/opinion/op-ed/laurieroberts/2017/12/19/roberts-866-teachers-have-already-quit-year-some/967075001/

Nevada is nearly as bad. https://www.reviewjournal.com/news/education/nevada-facing-a-shortage-struggles-to-keep-teachers/

Utah has the same rule as Arizona, that you just need a college degree to teach, because they couldn't find actual trained and qualified teachers. http://blogs.edweek.org/teachers/teaching_now/2016/06/teaching_degree_utah.html