Either the parents should homeschool their kids completely themselves, or else they should enroll their kids formally in a charter school.
Having successfully home schooled 3. I did just fine using outside classes to teach Chemistry, Spanish, college level writing and college level music theory not to mention art, music lessons, orchestra, chamber music and sports.
Knowing what your strengths are and teaching them is great, knowing where your weaknesses are and supplying the best outside help to teach your children is just loving and brilliant. When it comes to my children I wanted the best and that was never public reeducation that is opposed to the values that this country was founded on and I hold dear or allowing anybody to get their hands on those children all day every day without approving what was being taught.