This document provides an overview of key concepts related to educational technology and digital learning. It defines technology as the application of knowledge to organized tasks involving people and machines to meet sustainable goals. Media are discussed as channels of communication, with examples of now obsolete media provided. Educational technology is defined as the application of technology in education. Computing and internet history are briefly outlined, and examples of media and technology applications in schools are given. The implications of web 2.0 technologies like blogs and their role in education are also discussed. The document considers what digital learning is and debates whether a dedicated "Digital Learning Day" is needed.