Originally Posted by
Piper.Classique
same way that you do in a Piper Cub. Peer round the students head when you need to, otherwise fly the attitude. Most two seaters do have some sort of panel for the instructor, however. Not many countries allow gliders to cloud fly. France doesn't UK does as does Poland. And yes, I am a glider pilot, ex instructor on glider and power.
If cloud flying isn't legal then not much point fitting cloud flying instruments.
A reminder: this thread is about UNINTENDED flight into IMC. I agree that you might be able to teach flying by peering over someones shoulder but teaching correctly banked turns to a novice is easier if you have a T/S to show what is happening. A string might do the same of course but is not as good.
I don't know what the relevance of the French competition regulations is here!