Because of this we homeschooled. Our daughter did go to 1 year of middle school and 3 years of HS (she graduated 2 years early with full scholarship to private college-na na na na to the NEA).
The so called socialization is sickening. It is regimentation [at the elementary level] to a degree that would offend a DI. I could write pages listing the scary policies and specific incidents that I saw first hand.
As far as homeschoolers getting socialized? Well, I think my daughter is very well socialized [major grin here].
