The document discusses 4 case studies that examined how mobile technology can enable student-directed learning. It found that giving students autonomy over their learning with mobile devices, which provided anytime access through familiar functionality, contributed to student-directed learning. Students were able to use mobile devices for 21st century skills and both formal and informal academic and recreational purposes. This radically changed teachers' roles, as students took more control over their learning while teachers took a step back. In each case study, integrating mobile devices into the curriculum allowed learning to become more student-centered.