Energy bars for each lesson
I am confused. Today, I did a lesson, and when I was done, the energy bar was full and gold. The thing is, I struggled with that one quite a bit. But then when I go back to some of the easier lessons to try and fill up their energy bars, it doesn't seem to work, even when I do really well. What am I doing wrong??
It depends how much the word strength has decayed in each skill. If your earlier skills are quite decayed (i.e. you haven't reviewed them in a while), it can take a number of reviews to get the skill back to full strength / gold. Sometimes it's possible to get a skill back to gold getting only a single question right in timed practice, but if a skill is more decayed, obviously this doesn't happen.