William Lau has taught Computer Science, ICT, Media Studies and Business from Key Stages 1 through to 5 in four London schools and in an International school in Seychelles. He started teaching in 2006 and is currently an assistant headteacher leading on learning technology at the Children's Hospital School at Great Ormond Street Hospital. He was previously an assistant headteacher in charge of teacher development. In this role he was responsible for mentoring NQTs and PGCE students across the school. He also provided training in curriculum development, assessment and pedagogy within the school and at conferences, schools and universities across the country. In July 2017, William received an award from CSTA, Infosys USA and ACM for excellence in teaching Computer Science. In October 2017, Routledge published William’s first book, “Teaching Computing in Secondary Schools”. He is a prolific creator of Computer Science resources. He created a Computer Science Colouring Book, Computer Combat Cards – a card game to teach students about Computer Science and The Little Book of Algorithms to help students become more fluent in programming. During the Covid-19 lockdown, he wrote Computing Outdoors featuring seven screen-free missions.