Feature Request

First of all, I really appreciate this as a free resource. I'm studying for the LSAT and I'm finding it very helpful.  However, I've been studying for a while and recently I am (more often than not) getting repeats of questions I've already answered. I would like to request an "I've already seen this" button that will bring up a new set of questions so I can actually test myself on things I haven't seen before.  As the interface is now, the only way to change the question sets is to change the difficulty level, but in some cases I've seen those too. 

Thanks again for the resource.  Hopefully implementing this change can help others in the future.