I had a great internship experience when I was in school, and this summer the shoe is on the other foot. For the first time in my career I had an intern assigned to me but I'm having trouble - he just doesn't get it. He does ok with explicitly assigned tasks (testing, documentation, etc), but his main design project seems to be going nowhere. When I asked him to submit a written plan of what the objective was (after we've discussed it multiple times) it was completely different than anything we had talked about.

How can I rescue this experience for him?