An instructor for DevelopMentor, Llewellyn Falco is the creator of the open source testing tool ApprovalTests. He spends most of his time programming in Java and C#. Llewellyn splits his career between creating new programs and helping clients modernize their existing legacy systems—and finds joy in both. He volunteers creating courseware, teaching kids to program (teachingkidsprogramming), and on the SmartCare medical records project in Lusaka, Zambia. He blogs at LlewellynFalco.blogspot.com