The Chicago Tribune – David McGrath 
“Do you know what a quadratic equation is?” I asked her, referring to a key algebraic principle introduced in regular schools as early as seventh grade. No, she admitted. But she offered that someone in her club probably knows. That, I felt, was my gotcha moment, because it exposed the main problem of a parent playing teacher at the kitchen table. All that changed when I started teaching at the college level, on an evening when I came home from work, slipped off my shoes, collapsed into the recliner and announced to my wife that the best student in my college composition class had been home-schooled. (more)