[alawton]

To get the most bang for his buck, whatever you do in the short time that you have, make sure it covers an area that interests him. If he is into cars read something that talks about cars. You can then discuss what you have read. The goal is to get him excited about the topic and not thinking about the English words. He will more likely remember the vocabulary from the article on cars then he will on a subject that he doesn't feel strongly about. This sounds obvious, but I know I sometimes forget this when I'm teaching English. I hope this helps!