This is both hilarious and slightly alarming, because it implies the existence of a lot more shadow schools that may not be as well intentioned but aren't subject to scrutiny.

I was homeschooled for a bit in the 80s in the UK, but I think it would be considerably harder these days as every form of schooling is subject to OFSTED inspection and there have been a set of scandals relating to tiny religious schools with weird curriculums.