Esperanto in 31 days.
I have set a goal for myself today. It is my sixth day doing the Esperanto course, and I love it! It is very easy to pick up, but I will have to work on my vocabulary some more. Anyway, I have decided I want to finish Esperanto by day 31 (Essentially a month) I have 25 days left. I will have to do about 9 lessons a day to finish in time. I would love to thank supporters, and the Esperanto team!
I started Dutch, but I wasn't having fun with it, so I stopped. And removed it. (I want to see if I can test out of anything when I go to it again) I wanted to do Esperanto since I joined Duolingo. I know very little German, and a sizeable amount of Dutch and Spanish. I heard Esperanto is easy so I wanted to start off with something easy. I love Duolingo and I hope to strengthen my Esperanto after I finish my tree!
Good luck! I would love to do this too, as I have started recently and I love it, but I have my German tree to focus on too, so I can't neglect it to do 9 lessons a day :(. Although, maybe when another language comes out that I'm interested in I can set myself a goal like this :D!
Good luck my friend, I have faith in you!
It's probably a relatively sophisticated algorithm here at Duolingo with a lot of variables (and it's probably proprietary) but the main idea is spaced-repetition based on psychological science regarding forgetting. If you use a less sophisticated service like Memrise or Anki it is far simpler and more transparent: it starts you out at a short interval for a given prompt/fact and then each time you get it right it increases the forgetting-time exponentially (2 days to 4 days to 8 days to 16 days, etc). The time you are about to forget something is the best time to try and recall it, and this reinforces learning; if you get it wrong it will boot you back to some earlier interval.