For years, many schools and districts have had strict policies banning the use of students' personal electronic devices in classrooms. However, some schools are beginning to embrace the educational value of handheld Web-enabled devices that students already bring to school each day. As teachers begin to explore the educational opportunities that smartphones and other devices offer, we need to remember that the utility of any tool is only as good as our understanding of how to use that tool. This article attempts to introduce two simple ways in which QR codes can be used successfully in the classroom.