German state constitutions require children to attend public or private schools, and parents can face fines or prison time if they do not comply.
Thomas Jefferson wrote:If ignorance is bliss, why aren't more people happy?
Anyway, as Neil has pointed out these parents should find some state in The Union that will meet their tastes, Links To State Laws & Organizations For Homeschoolers.
I am not downplaying the pressure against homeschooling here, but only pointing out that it could be a lot worse.
"requires parents to send notification, test scores, and/or professional evaluation of student progress."
Better off not "schooling" them at all.
More detail: www.hslda.org/hs/international/Germany/201001260.asp