:-/ Yeah, deunionizing would be great.... Private school teachers get paid much less than public [1], with the bonus of being fired any time. Instead, when school districts attempt to bust the teachers union, they do it in order to funnel money to charter schools, often religious [2]. These charter schools have selective admissions, and often won't keep children with any sort of difficulty [3], which artificially raises their test rates, and hoses kids who need the help.
[1]: http://www.theatlantic.com/education/archive/2013/10/why-are...
[2]: http://www.denverpost.com/news/ci_28401042/colorado-supreme-...
[3]: http://dianeravitch.net/2014/02/26/breaking-news-new-data-sh...