Oral Education (N)
Oral education, or oralism, focused on teaching deaf children to communicate through speech and lipreading. Sign language was discouraged or actively forbidden.
A Dutch historical video (date unknown) of teaching speech to young deaf children (click on the picture to see the video):
https://en.wikipedia.org/wiki/Oralism#:~:text=Oralism%20is%20the%20education%20of,States%20around%20the%20late%201860s.