A test for her or a test for the teacher... ?

Audible oof

Wait, does check mark indicate "incorrect" in Japan? This is simply unacceptable.

the Q.E.D.✨ really gets me

"Pictures taken moments before disaster"

Hungry_Dong said:

the Q.E.D.✨ really gets me

d(sin x)/dx = sin is the one that did it for me. Usually see it as the old sin (x)/x joke, but this one puts a new spin on it.

Though... trying to figure out how she managed to get an answer of 9 for integrate x^2 over [3,2]. She even got the middle step right too...

Shawnofthedead said:

Wait, does check mark indicate "incorrect" in Japan? This is simply unacceptable.

Yes. Korea, Finland, Sweden and Norway too, incidentally.

(But not Denmark, despite being next to Sweden and Norway and sharing many cultural similarities.)

Added TL note to image to clarify things to people not familiar with the Japanese tick/circle convetion.