SAR
A private modern orthodox Jewish school in New York that has no walls, no doors, and no ivrit teachers.
Shlomo: Can you hear what the teacher's saying?
Yehuda: No, I can only hear the class next to us. We're in SAR!

Ruchaleh: Omigod! Did you hear about Morah Razel?
Sheindel: Wow! She was our 5th Ivrit teacher this year! Who will teach our class? Oy Vey... SAR