During our 14 years together at Northwestern University, Harold Guetzkow was at the same time my colleague, creative teacher, and helpful personal friend. I used his simulation in my undergraduate courses. His research and personal suggestions provided creative insights for my research at UN Headquarters. He provided younger colleagues with…

Computer-assisted language learning (CALL) authoring refers to a wide variety of creative development activities using software tools that run the gamut from simple templates (easy-to-use predefined forms into which content is typed) to complex authoring environments (flexible but harder-to-use systems, requiring advanced skills and a great deal…