Originally Posted by blackcat
What exactly are charter schools?
Here is the full description of charter schools from wikipedia. While the entries on wikipedia are crowd-sourced and anyone can contribute to them, the entries often contain a bibliography of meaningful, credible, authoritative source documents in their "References" section, located at the end of the entry.

Here is the wikipedia entry on school vouchers.

Here is a research report on school choice:
Empirical Evidence on School Choice, 4th edition, by Dr. Greg Forster Ph.D., May 2016, Friedman Foundation.
This is one of many available on the website edchoice.org.

The current US public education system has developed under other administrations; It remains to be seen how much DeVos may change the US Department of Education and how much the US Department of Education may change DeVos.