Teaching online poses challenges for teachers trained primarily to work face to face. The COVID-19 pandemic and subsequent lockdown of schools has forced teachers to move online to ensure students continue their studies. This is not an easy transition and success depends on educators having the skills, knowledge, and competencies for online teaching. As part of the Adaptive and Inclusive Learning Environment (AILE) project, this study surveyed 38 primary and post-primary teachers in Ireland on their use of technology and the impact of COVID-19 on their work. The findings present teachers' perceptions of their own skills and competencies and the challenges experienced in using technology. The research highlights the technological requirements for successful online teaching.