We speak with Samuel E. Abrams of Teachers College, Columbia University. The root problems in K12 education — including poverty-related stress and underpaid and underprepared teachers — are pervasive and expensive to fix. So instead, the U.S. has  adopted a “commercial mindset,” measuring success through standardized test scores and increasingly outsourcing school management to for-profit and nonprofit corporations. Dr. Abrams explains what we can...