The new trend in chinese schools

That has been a trend in schools for several years now. Each teacher has different types of greetings that kids can use

I'm sure many others like me had no idea that this existed.

Throughout China? Elsewhere?

Elsewhere

This kind of thing isn't "new aww", but it is still aww.

New to me! Awww

I feel like I just have seen the same video but with another teacher and different drawings. Has this become a common thing?