Well, as far as I know, I'm doing okay -- if I'm having a problem so far, I don't know it yet.
My son's problems? Well -- I'm finding out tonight he just didn't study, drill, or bother with things he didn't understand, assuming they'd be clear as time progressed.
I had a little "conference" with him tonight and asked him how he thought it was going. "Great! No problem!"
"Well, I'm glad to hear that! What's a macron?"
The last three weeks haven't been a total loss, though -- apparently he knows what a verb is.
I'm joking, of course -- he has made some progress, but it looks like he thought this was going to be pretty easy.
So to answer your question: If he has a specific problem, it's that he didn't think he needed to bother with things like flashcards and memory work. He read the chapter, understood about half of it, and it was on to the exercises, without really a clue as to what the chapter was about, or what he needed to do to really *study* it.
So we'll just start over on Monday.