Some years ago I met a friend for lunch just after she had picked her daughter up from her swimming lesson. Both of them looked ashen. Her daughter was about 5 at the time and apparently had just been on the sharp end of some “deep end learning”. Literally. This teacher had thought the best way to teach a child to swim was to make it a “sink or swim” choice. She worked on the basis that most children will swim for their own survival, and if they did sink, she would scoop them out.
Brutal. And needless to say, my friend never went back there.