I homeschooled my oldest daughter, the second part of her Kindergarten year----this was "forced homeschooling." At 5 years old, in November of her Kindergarten year, my daughter was forced to hug a male counselor while her lunch was withheld from her by her teacher. They decided she had "issues" because she refused to share her feelings in Magic Circle, a controversial, psychologically manipulative program; a program used on my daughter without my knowledge or consent. Her negative behavioral changes were immense for the weeks. I had no idea what caused these changes. Finally, she blurted out to me, immediately prior to Christmas Break (PC Winter break), the above information. Long story short, I pulled her out of school (subsequently joined a Citizens Group and fought against the School District (CA, of course), after being lied to, talked down to, ignored, repudiated). We won, but not after months of work.
While homeschooling, I learned of other homeschoolers, which met, every Friday, for a "p.e. class," where all homeschooled children met and played and competed against each other. My daughter, now 17, said she has, to this day, the most fondest memories of that time in her life. She learned a lot, jumped ahead in 1st as far as ability (in Kindergarten, she wasn't taught anything; she could not read, write, add by mid-December). By June, she could read, write, in both caps and small letters, add and learned geography, to boot; she still remembers our lesson about Ethiopia, especially, Africa and its varied topography and climates.
There's few homeschoolers, as I understand it, who do not participate in group activities during the week with other homeschoolers.