When you compare homeschool test scores to public school test scores without controlling for background variables, you aren’t actually measuring the results of being homeschooled, you’re measuring the results of being in a demographic that is, to quote from the ICHER FAQ, “whiter, more religious, more married, better educated, and wealthier than national averages.” - See more at: http://www.patheos.com/blogs/lovejoyfeminism/2013/06/stop-saying-homeschoolers-are-brilliant.html#sthash.wT8F1Ydz.dpuf