on anything he may encounter on his first solo.
Just wondering. What circumstances could force a first-solo student to do a touch-and-go instead of a full stop landing?
The only scenario I can think of where a t&g would be appropriate would be a brake failure. But other than that, a touch-and-go will almost certainly require a longer distance than a full stop so if anything goes wrong, it'll be safer to do a full stop than a touch-and-go. (And if you land too long for a full stop, you should've done a go-around in the first place.)
As I said before, I find it much more important to teach proper go-arounds. Touch-and-goes, I think, should only be used if you're practicing landings (with or without an instructor) and you don't want to spend time doing endless taxibacks. But touch-and-goes for the sake of touch-and-goes...?