Quick overview: Duolingo is a free tool that helps students learn a second language at their own pace. Duolingo is available on the web or as an iPad/Android app for mobile devices. In reviews, Duolingo is often compared positively to Rosetta Stone. This tool is definitely worth checking out, highly recommended!
How can this be used in the classroom? First and foremost, I see this tool as an excellent fit for a student in an individualized FSL class. Using concepts borrowed from a gamified classroom model students progress at learning a language at their own pace and progress through skill trees which requires them to master concepts before moving onto learning more complicated material. Students will be asked to speak, listen, and read in French. For my international readers, it works in other languages too! (Source: Adam Bellow’s “Make Your Classroom Rock” ISTE 2013, San Antonio)
Benefits and Limitations: If you plan on using this tool in your school’s computer lab but don’t have enough microphones to go around, you may want to consider using the Duolingo App on an iPad or Android device instead. These devices already have a microphone built-in. If you’d like to read more about the effectiveness of Duolingo, please take a look at this detailed report.