Understanding different brains -- The brain’s key operating systerms -- The argumentative learner : oppositional defiant disorder -- The resigned learner : learned helplessness -- The out-of-control learner : conduct disorder -- The demotivated learner : stress disorders -- The troubled learner : depression -- The isolated learner : pervasive developmental disorders -- The challenged learner : learning delayed -- The confused learner : dyscalculia -- The unsound learner : central auditory processing disorder -- The impulsive learner : attention deficit hyperactivity disorder -- The frustrated learner : dyslexia