Brian Hahn was a professor in the Department of Mathematics and Applied Mathematics at the University of Cape Town. In his career, Brian wrote more than 10 books for teaching programming languages to beginners. Katherine Malan is a lecturer in Computing Education at CIMSTE (Centre for the Improvement of Mathematics, Science and Technology Education), University of South Africa. Since 1997, she has taught a range of Computer Science undergraduate courses from programming (in Java, C++, Delphi, Visual Basic, Prolog, Pascal) to databases and human computer interaction. She has also taught a number of courses to professionals in industry. From 1997-2002 she ran a Computer Science development programme for students from educationally disadvantaged backgrounds at the University of Cape Town. In 2002, Katherine joined CIMSTE where she is running courses aimed at the professional development of computer science school teachers. To balance her technical work, she is a volunteer Life Line crisis counsellor and loves to cycle and hike in the numerous mountain ranges of South Africa. She can be contacted at malankm@unisa.ac.za.