Answer:
The treble clef located on the second line of the staff is called the second treble clef or simply the treble clef. In the baroque period it was known as the "Italian key". Currently in English and German it is called respectively "treble clef" ("treble clef") and Violinschlüssel ("violin clef").
I would say you could do:
Posters
Powerpoint
A letter
A class
Or a lesson!
