Translation:The teacher said: "It is forbidden to speak while raising a hand.".
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?
I wonder WHOSE hand is raised? The teacher's or the student's?
It is not saying hand "el"
We usually use personal pronouns with parts of the body. "...while raising your hand."