There are plenty of business books written about leadership, but not every employee (or CEO) is a great leader. Likewise, although every teacher stands in front of a classroom of students, they're not all leaders in their schools. But they should be. With their newly released Teacher Leader Model Standards, the Teacher Leadership Exploratory Consortium wants to jump-start the conversation about "the knowledge, skills, and competencies that teachers need to assume leadership roles in their schools, districts, and the profession."