How does the practice function work - how does Duo decide what you should practice?
I've got words in my word list that Duo say I've not used for a year or more and I need to practice. I periodically press the practice button, but it never seems to pick any of the words from the really old list.
I'm just curious how this is supposed to work. I admit that most of the time I'm doing new lessons or tests, especially since the French tree just reset, but even so I do press practice from time to time and it never seems to pick old words to refresh?
I've noticed this as well. I assume it's a problem linking words learned in past Duolingo 'versions' to the current software. Many of the words marked as 'overdue' in my words list come up regularly in lessons so it's a problem with the word list not with the system refusing to review those words.
I don't have an answer for you, but I wanted to say that I have the same problem with Duo. I've started using TinyCards each day for this reason, but it seems to have it's own issues, at least on Android.