I must say, I'm impressed with the way this discussion is going so far (I've only read the first page, so I don't know what the second brings, lol)!
Currently, I HS my 7 y/o 1st grader and my 4.5 y/o goes to preschool 2x/week for 2.5 hrs. per time. Next year, my preschooler will be going to Kindy in public school. It's something I feel he needs for various reasons. I also plan on putting my 7 y/o into second grade next year in public school. I'm doing this mainly because I don't feel like I'm getting enough stimulation for him both academically AND socially. I'm just having a hard time making it work. I think it comes down to my personality and the fact that my preschooler is SO demanding. Another reason I'm doing it is frankly, I need a break from being "it" during waking hours all week long (esp. from my preschool--sooo high needs), if you kwim.
Selfish reasons? Maybe to some. But I want my kids to have the best that I can give to them, even if it's NOT *me* giving it