This document provides an introduction to technology enhanced learning. It discusses how the modern knowledge economy requires lifelong learning. It describes key findings from learning sciences, including the importance of deep conceptual understanding, connected knowledge, and collaborative learning. It also discusses motivational competence, self-regulated learning, and how technology can support deep learning and collaboration through representing knowledge concretely and allowing learners to build knowledge together. Examples are given of learning, collaboration, and technology use in the author's research and teaching.