Duolingo, the free language-learning service, is releasing an app called Test Center that lets users take a standardized test on their mobile device and potentially earn certification for their ...

Duolingo today launched Test Center, its own English language certification exam that can be taken on the Web or an Android device. The fresh alternative to standardized language tests was first ...

Education is quickly moving online, but we haven’t seen all that many studies that actually look into the effectiveness of these new forms of online learning. To see how its program performed, the ...