Everyone knows that boys are falling behind in education. Largely left out of the discussion are parents of boys, who are most aware that their bright, eager sons hit an invisible wall somewhere near fourth grade, after which they become disengaged, discouraged, and disaffected. There are dozens of books on underachieving boys, but most parents brave enough to lift one off the shelf are instantly intimidated by the footnotes, graphs, case studies, and academic-speak addressed almost entirely to educators. What about the average guilt-ridden, frustrated mother or father of an underachieving...