We've already started home schooling our four year old and will continue down that path with her (She is at a first grade level already). The wife and daughter attend a home school coop that meets every Friday. She gets different perspectives from other teachers and socialization with there as well as gymnastics.

Hopefully this will be enough interaction with other kids. I think it may cut down on the over interaction that leads bullying and other anti-social behavior.

I think for the youngest home schooling is the way to go since she does not wish to be as outgoing as the oldest.