One day after class, one student asked me if I would refrain from using red marker on the board. He said it was a bad omen. Have any of you heard of something like this, or was he just being superstitious on his own?
Never heard about it on the board, but I know in China you shouldn't write in red (except for corrections on student work). I forget the reasoning, but I know it's really bad to write someone's name in red. I had a difficult time avoiding it because I'm an editor and a red pen is usually the nearest color.