Suggestion: Create lists of words and explaining grammar notes
I discovered this amazing website a few days ago and while practising I found myself searching for a list with the translations of the new words that I had learned or simple grammar rules to explain the theory behind the practice. I suggest that users or even Duolingo staff were able to create those lists to make memorising easier.
Thanks for making this the best way to learn languages!
For a list of translations, head to the vocabulary tab at the top of screen. I'm not sure, but that might be what you're looking for as far as word lists.
Some grammar can be found in the "Tips and Notes" section in most lessons. Although, it would be useful if it was it was expanded upon and put in one section, but for now you can always use stuff from other sites to supplement grammar
Here are some good ones:
- http://german.about.com/ - German on About.com
- http://www.youtube.com/playlist?list=PL2fCGQa2PY7CDJkKsRiYNC-7XxiU4I10f - The Hammar Grammar video series on YouTube
For your last suggestion concerning lists, you can always look around for lists on sites like StudyBlue, Quizlet. Anki, or Memrise.