In 6th grade my music teacher took us all to her house during
  school hours to watch The Wall. [this was early 80s]. She taught
  us how to sing "Another brick in the wall" in class. About a
  month later, she was no longer our music teacher and we weren't
  allowed to sing that song in the hallways. Could be coincidence.
  "We don't need no education.." I guess they thought we'd flip
  over desks and burn the school down or something. I dunno.