Duolingo as teaching methods
It would be very helpful if schools could use Duolingo for finals, chapter tests, language level tests, extra credit, homework, etc. Writing on paper is boring! Doulingo is interactive and fun. Students would love it. Teachers could make their own test or class and give them to the students (maybe with a computer app given to every school in a near future as a teaching method). It is free, so even a poor school with a computer could use it. In my days I would've learned languages so much easier with this.
Somehting like: Exercises aimed at helping students deal with real life situations. Maybe lessons with questions to be answered and not just translated. Also, the social media part of the website. could expand so that new learners can get to talk to each other in the target language. Duolingo is currently only god to increase vocabulary, reading and writing skills...