One of my Japanese senseis corrected my homework, and several times she drew a triangle next to the item she was correcting. Does this have a special meaning in Japan?


One of my Japanese senseis corrected my homework, and several times she drew a triangle next to the item she was correcting. Does this have a special meaning in Japan?


In Japan (or Japanese schools), it usually means "Not correct but not completely incorrect, either".
〇 = Correct
△ = In-between "I'll give you half a point!"
☓ = Incorrect
The three symbols are read, respectively, まる、さんかく and ばつ.
Δ is the greek letter for delta. The upper-case letter Δ can be used to denote a change of any changeable quantity. This means the answer is WRONG and needs to be changed.