I started out adding a couple of hundred cards and now find it would be better to create a list of 20 cards,  drill through them until I know them and then add  another 20. Later I might want to add all my lists together to revise but then I still want to clear it and start on another 20 new words.

I tried doing this by adding 20 word lists to the top of my lists  but I still seem to have 150 words or more on my Android Tablet. I have tried blocking the words I added earlier but this prevents my new lists adding the words.

What I would like is to clear all words from my device,  load from my own lists imported into this site, and then clear that list so I can learn a new list.

Maybe I can already do this on your site but I can't see how.