STRONG INSTRUCTIONAL LEADERSHIP FOCUSED ON AMBITIOUS LEARNING GOALS SOON UNCOVERS SHORTFALLS IN TEACHERS’ KNOWLEDGE AND SKILL. IN MANY CASES, THOSE SHORTFALLS ARE SHARED BY THEIR LEADERS AS WELL. A POWERFUL DIFFERENCE CAN BE MADE BY TEACHERS AND LEADERS LEARNING TOGETHER ON THE JOB ABOUT HOW TO ACHIEVE THEIR STUDENT LEARNING GOALS.