On the old layout (tree), you would see on a lesson that the XP go from 20 or 10 to 10 or 5 after you completed it. If you did the same lesson it would go down to zero. On the new layout, how can you keep track? I see that the XP displayed on the lesson does not change. I have a hard time keeping track of which lesson I did, and have done the same lesson twice (and sometimes three times), because I have not found a way to keep track.
Any tips or tricks is appreciated!