“Say ‘6-7’ one more time,” one teacher posted on TikTok, pretending to address a student in her class. “We’re gonna call your mom in about 6-7 minutes, let her know how you interrupt my class 6-7 ...

It lands like a pebble in a quiet classroom and somehow turns into a small tidal wave. Teachers sigh. Lessons derail. Some schools in various countries have simply banned the phrase. Welcome to the ...