Wireless communication and networking courses are becoming increasingly popular in universities, polytechnics, postsecondary colleges, and private training institutions around the globe. This is partly because of rapid developments in wireless communication-network technology and the high demand for wireless networking skills in the industry, both nationally and internationally. Unfortunately, it has often proven difficult to motivate students to learn about wireless local-area-network (WLAN) design because they find the subject dry and theoretical. A Web-based software tool (named WLAN-Designer) has been developed at the Auckland University of Technology (AUT) that gives students an interactive, hands-on learning experience in WLAN design. The WLAN-Designer is suitable for classroom use in introductory-level courses in wireless networking. The effectiveness of the WLAN-Designer has been evaluated both formally by students (student-evaluation forms) and informally through discussion within the teaching team. This chapter describes the WLAN-Designer and its effectiveness as an aid to learning and teaching about WLAN design. The conclusions drawn are based on survey data collected from students. The feedback from students indicates that the development and implementation of the WLAN-Designer were successful. The chapter concludes by discussing the strengths and weaknesses of the WLAN-Designer and its future development. The impact of the WLAN-Designer on students’ performance is also discussed.