How do you increment the "practice skill" button?
At the bottom of every skill is a button with "Practice skill" and four bars of progress, offering 10 points. How do you get the bars of progress to go up from the rank-one level? Doing the practice over and over does nothing (except get you better at your language). Does it have something to do with your success level in the timed practice? Duolingo never says...
I agree that it SHOULD.
But my question is how does this happen. What is the trigger? Thanks for taking the time to respond.