Mobile devices have become an important part of our daily lives and, because of our familiarity with the technology, present a terrific opportunity to enhance learning and development. But to incorporate mobile technology into training, we must first fully understand what mobile learning (m-learning) is, and then identify the movement, adoption, and implementation of m-learning as a learning strategy. In this issue of TD at Work, you will learn about: • the varying definitions of m-learning, as well as drivers and barriers to its use • learning theories, and how to apply those theories to m-learning • informal learning methods, and how they can be part of a learning and development professional’s toolbox. “Applying Learning Theory to Mobile Learning” also provides readers with a 30-day plan for more fully understanding and appreciating m-learning.