Homeschooling is legal in many countries. Countries with the most prevalent homeschooling movements include Australia, Canada, New Zealand, the United Kingdom, and the United States. Some countries have highly regulated homeschooling programs as an extension of the compulsory school system; few others, such as Germany, have outlawed it entirely. In some other countries, while not restricted by law, homeschooling is not socially acceptable, or considered undesirable and is virtually non-existent.