This article reports on teaching information and communication technology (ICT) as a subject. It arises out of research carried out with ICT trainee teachers during their initial training and their first years of teaching. The backgrounds of four cohorts of new ICT teachers are described along with levels of retention in teaching. The associations that trainee and new teachers make with their subject are then explored. It was found that specialist ICT teachers see ICT as a practical subject offering pupils scope for variety and control over their learning. A key, and they felt unique, feature of ICT was its ever-changing nature. The research explores the planning and teaching of ICT and features of ICT subject knowledge. The article concludes by highlighting the continuing shortages of specialist ICT teachers in school and the need to support the career development of those teaching ICT. (Contains 6 tables.)