What does ◎ mean?

[Maybo]

I saw this symbol ◎ in a language book written by a Japanese teacher. He uses ◯, × and ◎ to indicate correct and wrong answers. I understand ◯, × but what does ◎ mean?

 

[mdchachi]

I believe ◎ would normally mean excellent or perfect or best answer. 〇 would mean correct. Check the intro in the book to see if it explicitly defines the symbols. (But it may not since these are pretty commonly used across Japan).

 

[Mikawa Ossan]

Another thing to look out for is a triangle. △, also called "sankaku" would denote an answer that is neither strictly correct nor incorrect, but rather somewhere in between.

The double circle could be a form of "hana maru", which is sometimes used for children to be more flashy and therefore more exciting to receive than "just" a maru (circle).