I can only assume these nonsensical sentences are used to try us :-)
Stargazza, this might help:
fascinating and explains a lot!
Military school, salutation perhaps?
Another stupid sentence. Can we learn something logical?
I wonder WHOSE hand is raised? The teacher's or the student's?
Does it mean that you can't begin talking until the teacher acknowledges your raised arm/hand? Or what?
It is not saying hand "el"
We usually use personal pronouns with parts of the body. "...while raising your hand."