Diane Ravitch reported that Steven Singer was blocked by Facebook for a week, censored by an algorithm because of the post you are about to read they said: “violated community standards,” but was censored by the Political Defense team that prevents criticism of charter schools and TFA. It swarms Facebook and other social media and complains that a post or tweet is “offensive” and blocks the offending post, like this one about 'school choice' that DeVos and ALEC and charter promoters don’t want you to read. He writes:'Charters and vouchers are the Walmartization of public education. They introduce corporate chains to run what used to be neighborhood public schools. Charter schools are run by private interests but paid for exclusively by tax dollars.Voucher schools are privately run but take money from public schools that serve all students, but they expel those they don't want. '