There's two completely separate issues in the article.
One is the financial aspect, which she only touched on for - literally - two sentences:
As a newly single mom, I cannot live in this community on the salary I make as a teacher. With the effects of the pay freeze still lingering and Colorado having one of the lowest yearly teaching salaries in the nation, it has become financially impossible for me to teach in this state.
I can't speak to the exact numbers, as I know neither her salary nor the COL there, but being a Mustachian at heart, I'm betting I could make it work. Thousands of teachers there are.
The second issue is the quality of the education itself. I am a teacher, as is my wife, and I agree with much of what she said, except that I think the Common Core is helping. I do think we need less teaching to the test, and more "think for yourself" stuff, but as far as content, I think the CC is a step in the right direction. A small step, and the point we want to get to is far in the distance, but at least the vector is correct.
More discussion on education and the Common Core in this previous thread:
https://forum.mrmoneymustache.com/off-topic/testing-and-common-core-in-public-schools/