Helen C. PurchaseDr Helen C. Purchase is a Senior Lecturer in the School of Computing Science, University of Glasgow. She has been awarded teaching excellence awards from both the University of Queensland and the University of Glasgow. Her research has been publishedin numerous journals including IEEE Transactions on Visualization and Computer Graphics, the International Journal of Human-Computer Studies, Information Visualization, Graph Drawing Conference and the ACM SIGCSE Bulletin. Her research focuses on visual aesthetics, collaborative learning in higher education and sketch tools for design. Read More Read Less