Success, in which parents are digging it from surveys and interviews ive seen, really anecdotal, i know. When it comes to data, ehh good luck, Tulane did a study with mixed results but, the thing about that is only a few schools participated. A lot of the private schools said they will not have government coming in and trying to affect school policy, if they do then a good bit said screw the program.
Teaching background? Nothing besides military classes... Also I put one source up already for the Dutch school system. Just type for the voucher system they all say the same thing pretty much. If i wasn't on an I Pad I wouldnt mind doing all that work