symbols - My teacher wrote a triangle on my Japanese homework. What does it mean?

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?

Answer

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.