This Element is a practical guide for language teachers intending to upgrade their online teaching. During the COVID-19 pandemic many teachers were forced to move their teaching online without proper preparation and support. This has led to frustration and stress, and sometimes decisions based not on sound pedagogy but on technological constraints, requirements and opportunities. To balance this negative experience, a research-based, pedagogy-focussed approach has been taken in this volume: step-by-step, teachers are shown how to make decisions about the choice and usage of online tools, how to adapt their pedagogy and teaching strategies to fit with online learning environments, and how to create a positive learning experience for their students. In six sections this Element takes teachers from epistemological considerations to learning theories, from teacher-centred to learner-centred online tuition, and from technological needs to pedagogic choice, ending with suggestions on how to future-proof language teaching.