The idea of mastery of computing is fascinating to explore. It has been challenging and exciting to work with teachers in primary schools, to develop ideas of what this looks like and how it can be achieved. Do the learning experiences we plan provide opportunities for our children to become masters of their use of technology? What can this look like? How do we build mastery as part of planning to increase the skills and knowledge of our learners? How is it attainable in busy classrooms?