"Harvard Education Letter" is published bimonthly by the Harvard Graduate School of Education. This issue of "Harvard Education Letter" contains the following articles: (1) Teaching 21st Century Skills: What Does It Look Like in Practice? (Nancy Walser); (2) Getting and Spending: Schools and Districts Share Lessons on the Effective Uses of Philanthropy (Lucy Hood); and (3) Creating a Culture of Reciprocal Accountability: How Five New Principals Won Their Faculties' Support for Schoolwide Reforms (Gerald C. Leader). Online version may contain additional articles.