What does Einweisung mean from an aviation standpoint?

[RolandF]

What I wanted to know was the difference between Einweisung and Einweisungsflug - not the same as we know now.
Just remember the famous Me 262 familiarization movie with "White 10" - quite clearly a Einweisung on the ground.
An Einweisungsflug with a trainer beside you or on the rear seat goes off quite different. Thx for the clarification.
Btw, "Platzflug" seems to be a short flight around the airfield only accompanied by the instrucor, but otherwise a rather independent flying without interference by the Fluglehrer.

Regards

Roland