TONY JENKINS is a Senior Teaching Fellow in the School of Computing at the University of Leeds. His main area of research lies in innovative approaches to the teaching of computing, and especially introductory programming. He has written and spoken widely on the best ways to teach programming, and was awarded an MSc by the University of Kent in 2002 for research on the best ways to go about teaching it. GRAHAM HARDMAN works as a Computer Support Officer in the School of Computing at the University of Leeds. He is an experienced programmer in C, Java, Perl and Python.