How to disable some lessons from practicing
There is some German material that I will remember till the end of my life. What I find annoying about duolingo is that it asks me to practice stuff that I know very well. And I do that boring stuff over and over, instead of practicing some new, more difficult material. I really, really know what a sentence "Hans ist mein Bruder" means and I don't want duolingo to asks me that every few weeks. I want to mark that lesson as "never ever bring that back for practice" or "disable for one year for practicing". How can I do that? I would be way more productive with duolingo if it didn't ask me for stuff that I know very, very well.
I could definitely be wrong about this, but it's my understanding that the practice button is only linked to skills you have reached level 5 in. Maybe it's giving you the same sentences over and over again for that reason. The more level 5s you complete, the more variety in your practice (use of the practice button).
Not quite. The general "Practice" button has always ignored the skills. It looks at the words you've seen before, picks a few of the ones it thinks you know worst, and then tests you on those. (The Duolingo staff have not said that this behaviour has changed and, from a learning perspective, it would not make sense to tie it to skills rather than words.)
Before the crowns system, once you did the lessons for a skill, you also got a practice option for that specific skill. The difference now is that Duolingo only shows you the skill-specific practice once you reach level 5 for that skill. In fact, the skill-specific practice is still accessible in the web version whatever your level. You can access it using https://duolingo.eu/mk939/progress/ .
It looks like your progress on the app has not succesfully with the server: https://www.duome.eu/Minervita3/progress
It only shows crown level 4 for both skills in your EN-DE course.
Have you done the lessons on the web portal?
4 + 2 lessons are already registered for L5.
What is total displayed? Isn't it 10 or 20 lessons for the next crown level?
These are the statistics polled from your extended user profile: http://www.duolingo.com/users/Minervita3