Brain Rules (Updated and Expanded): 12 Principles for Surviving and Thriving at Work, Home, and SchoolMost of us have no idea what's really going on inside our heads. Yet brain scientists have uncovered details every business leader, parent, and teacher should know like the need for physical activity to get your brain working its best. How do we learn? What exactly do sleep and stress do to our brains? Why is multi tasking a myth? Why is it so easy to forget and so important to repeat new knowledge? Is it true that men and women have different brains?