The 16 Race to the Top district winners, pushed by $400 million in federal grants that put a premium on personalized learning, are embarking on vastly different makeovers of the classroom experience--from districtwide approaches to a narrower blueprint focused on middle school math. Despite the divergent approaches, a review of the winning applications shows those districts are tapping similar tactics: mobile devices and individualized learning plans for students, personalized learning coaches for teachers, and data dashboards that collect all student learning information in one place. What's more, many of the districts are embracing the philosophy that learning isn't defined by time spent in class, but by mastery of a particular subject or lesson.