At my airfield;
-There is a large mil, radar'd, lit airfield within visual range (about 4nm) which I point out on a recent lesson.
-There is a large, radar equipped, lit GA airfield direct south of the airfield. If you go past it, you get a big clue....the sea. This at some point is also pointed out to the stude.
-I'm in the tower. I tell the student to either join visually for the large mil airfield, or fly due south and call the GA airfield. In either case, I've called the airfield in question and told them what is going on; they pick them up on radar and vector them in. As a good FI, I've already shown the stude how the radio works and what a heading is....
-Stude lands. We go pick up her or him in the car...no drama.