I have two Korean students (1:1) at the moment who really struggle with prepositions and articles. They understand the theory but struggle to use them accurately in practice.
They're at an intermediate level...
I was wondering if anyone had any suggestions to help them.
Are there any subjects that lend themselves to practice the different uses? Any particular drills?
Articles can be a problem for along time for speaers of languages that don't have them. It's often not something that can be cleared up quickly, but something that has to be returned to at all levels of learning.