It is way past time we stopped calling charter schools public schools and the only reason education deformers do so is they think it gives their anti-public school privatization agenda some cover. What they really are is publically funded private schools and despite numerous advantages many perform worse than their public school counterparts.
The US Census Bureau doesn’t think they are private schools: http://www2.census.gov/govs/school/11f33pub.pdf and they aren’t the only ones.
Neither does the National Labor Board: http://www.wbez.org/news/chicago-charter-school-subject-private-sector-labor-laws-104660
And education policy scholars as well: http://schoolfinance101.wordpress.com/2012/05/02/charter-schools-are-public-private-neither-both/
And if you still think they are, I have a bridge to sell you cheap.
Above was inspired by the Jersey Jazzman post: http://jerseyjazzman.blogspot.com/2013/05/us-census-bureau-most-charters–
Which had the great quote: Taking public money doesn’t automatically make you a public entity; if it did, Halliburton would be its own branch of the military.