Practicing words that presented problems?
I saw someone mention a link for "strengthen weakest words," but I don't see that. Where is that located?
Also, even if I did find that link, I don't think duolingo would know which words have presented problems since I generally figure out the meaning of words and think things through before responding to each question. If I find something that presents a problem, I write it down so that I can study later. It would be neat if there could be a way to mark different words for later practice. For example, perhaps we could double click a word so that Duolingo would know to include that word more often in the future.
Another option would be to make it possible for us to mark off words for virtual flashcards. I would love to have a quick round with flashcards prior to starting a new lesson.
At the moment, there are two ways to strengthen skills outside of repeating the individual lessons. One is outside of the skills (first screenshot, blue button) the second is inside of a skill (second screenshot).
If you want more of a challenge and less time to think before inputting your answers, try getting a Timed Practice from the Lingot store (Home tab. I always suggest that people get it as early as possible and use it everyday. It is a good tool for review.
I hope this helps ^_^