Homeschooling Support Group
This community is dedicated to parents, educators, and students involved with home schooling. Home schooling - also called home education or home school - is the education of children at home, typically by parents or guardians, rather than in a public or private school. If you have chosen to provide education to your children at home, join the group and get support.
One of the things suggested to me for summer activites might actually work for socialization during the school year. I haven't tried it yet, but one of my son's providers recommended kids activity "classes" through our local "Parks and Recreation Department". My son has a disability and in my area they can assign him an inclusion assistant for the parks activities if I give them enough notice.
Anyway, I haven't tried it yet and I can't know if it would work for you, but it's a possibility.
I hope you find what you need.
Honestly I have chosen to become a home educator to give my son better moral upbringing, than he could achieve being among students are are likely to pressure him into drugs, or other behavior that might put him on the wrong path down the line.
There are plenty of opportunities for children to be social outside of the public school system. There are often other homeschooling parents, or groups who get together on a regular basis.
Also, many cities have programs for children, such as science camps, etc. In my city we have so many programs for science, history, chemistry, etc.
The biggest benefit to homeschooling is you can spend more time with your son ensuring they comprehend each subject, rather than seeing them left behind by the public school system. My son is six, but we are a few months into the second grade.