How can States address the continual and extraordinary challenge of sustaining and adapting the reforms they have implemented to improve student outcomes? What steps can States take to do so in the face of inevitably evolving conditions--such as a change in resources (for example, the end of a grant), leadership (a transition in personnel or vision) or context (a shift in stakeholder support)? SEAs can apply this brief as a guide to the initial stages of planning for sustainable education reform. The sustainability tools introduced prompt States to consider what should be sustained and how to approach the challenge. Planning for sustainability, like evaluation, is a cycle of assessment and planning designed to ensure the continual refocusing and strengthening of efforts to improve how education serves students. This brief is based on the real experiences of six Race to the Top State grantees that took part in the Reform Support Network Sustainability Work Group during 2014.