Little research has investigated young people's use of school computers outside lessons, a deficiency that prompted the writing of this paper. The ICT-related behaviour of pupils within the Resource Centre of an English high school is scrutinized, with data collected through observation and online questionnaire. The computers, which were especially popular before and after school, were heavily employed for private e-mailing, and their exploitation for personal purposes was greater than that for school work. E-mailing was particularly common among girls, whilst many boys spent much time playing games. Game playing had plummeted by Sixth Form level, however, and academic use was more prevalent among this age group. (Contains 9 tables.)