How I Use It
I have used DuoLingo as a supplement to my teaching. It is very easy for kids to get started and the great thing is that they can go at their own pace. While DuoLingo doesn't necessarily "teach" or have skills practiced in the same order that I teach them, it does reinforce many of the concepts and vocabulary already covered and introduces material in a way that the concept would not have had to be taught ahead of time to comprehend. In this regard, DuoLingo is fantastic as students not only review but also really learn.
I think it is a great app. I have used the web-based program as well and am pleased. Students can play against one another, they can compete as a class and I, as the teacher, can monitor progress. I do wish there was a bit more in the teacher dashboard but, specifically, I am not sure what I would ask for in that respect.