Children come to school with different aptitudes, many of which determine their ability to learn. Some are quicker at grasping the concepts and skills that form the core of most educational curricula. Others are better able to concentrate or make friends. Some seem lazy; others determined. As a result, we label children as smart, attentive, social and hardworking—or as slow, distracted, shy and lackadaisical. The labels suggest fixed traits, not teachable skills.