Homeschooling is generally considered a non-mainstream form of schooling. It makes up about 5% of children’s education in America and about 3–4% in Australia. In other countries, homeschooling is banned as illegal or laws are made so difficult is effectively banned.
I think homeschooling is becoming more common these days (compared to 20 years ago) because many parents see public schools (and to a lesser degree private and Christian schools) as decreasing in moral and intellectual value.
This accounts for the massive increase in Christians leaving public schools in America (and Australia). With programs such as ‘Safe Schools’ (Australian) and Californian laws where boys can use girls bathrooms, homeschooling is seen as a safe haven for kids to grow up with their parents Christian values.
New age thinkers, or hippies, don’t like the boring aspects in school (such as Common Core) and would prefer their children are brought up as being interested in the study they do (instead of bored out of their brains so much of the time).