I know many people who choose to homeschool their kids that I have the utmost respect for, they do an awesome job. While I also know others who claim to be homeschooling their children yet, all they do is put in a 'teaching video' for their kids to watch and thats what they watch...
When my son was in a "Christian School" they had someone sitting in the class monitoring the kids, all she did was pass out worksheets, put in a video with someone else actually teaching, then she sat there, she looked over the papers and graded them by comparing them to the "teacher's worksheet' that came with the material..she didn't know the material herself, so she couldn't sit down with the kids and show them why they got the wrong answers..I'm assuming the parents I know who do this, are using the same material that school used.
While I know not all Christian schools are like that, I'd take a public education over that any day...because that is not educating the kids..
I also know of some homeschoolers who take classes online at a Virtual School, much like online college courses, and the parents just leave the kids alone on the computer all day doing 'school' work. And the only interaction they have with their kids is taking them to and from various activities..and then they pat themselves on the back because they are 'homeschooling' their kids. When in reality, someone else is educating their kids, their kids just aren't sitting in a public school class room all day..
Again, I know some parents who homeschool their kids and are very active in the actual teaching and checking..but there are also many parents who aren't...and we personally can not afford to pay the $3,200 per pupil (less 10% discount for additional students) tution the local Churches here now charge for kids to go to their schools...yes it covers books and supplies, insurance for the school, teachers salaries, school upkeep and soforth, but it doesn't include school uniforms that are also required or field trips, or project materials, or a whole host of other things they also need money for...and I certainly don't spend that much in school supplies, projects, clothes, field trips and such throughout a school year in the public school they attend now..for four kids.