Send work back if you aren’t satisfied. Insisting on excellence and being prepared to ask students to improve their work sends a powerful message about building strong work habits. Improving or redoing work should be seen as a necessary part of learning, not a sign of failure. Look for excellence in every task by pushing students towards greater precision, detail, sophistication and depth in their work. Begin with high standards outlined in criteria for top levels and use these to guide students from an early age. Avoid low-value activities and presenting work that does not demonstrate real mastery of the subject.