That is a difficult question to answer even if the question seems simple. How do you measure how good the school is? Test scores?? Didn't we have a discussion here in the last month about how much testing goes on and what good it does for the kids? As a teacher, you might have different criteria for what you'd like in a school as a teacher vs. as a parent.
CO has poor public school funding, close to $2700 less per pupil than the national average, largely due to an anti-tax amendments passed in the 80's and 90's. The public school teachers I've known have all done their level best for the students, but you can't squeeze blood out of a turnip. In general, schools with a more affluent community supporting the PTOs do better (on test scores at least) but that might be more a function of student SES more than anything else. I grew up and went to school in CO before the anti-tax amendments affected public education much, and I feel that DD does not get the enrichment (music, art, field trips) that I got when I went to school. It's sad, short-sighted, and shooting ourselves in the foot by failing to support the next generation the way they should be. They're the ones who will be running the show when we're old.
According to
this graph, the only states that have worse changes than Colorado to per pupil funding are Georgia, Texas, Indiana and Idaho.