D F CarlD. F. Carl currently lives next to Miniscule Mountain Park in New Hampshire. For most of his life, he has studied thinking (not to be confused with what psychologists study, e.g. measurable physiological responses or behavior). He has noted that big roblems are rarely solved with the same kind of approach that created them. For example, despite decades of accumulated theories in educational psychology, half of American students still fail to understand algebra or higher math. Forgoing advanced degrees in educational psychology, he has explored less-orthodox but more immediately-practical ways of thinking about educational problems. Read More Read Less