Prior to lab a student asked me a question, commenting that he couldn't read what I wrote on the overhead (yeah, still use one). I answered the question and said "that's why I had the information on Blackboard". He of course didn't realize the material was available online. I immediately thought "Oh great, one of those". During the lab, (It is small, 7 students) It became obvious by the questions he was asking that he was colorblind. I was using a blue pen, he could see anything. Immediately his classmates surrounded him, helped him with his notes and explained things to him. It isn't my victory, but I was proud of my students coming to his aid.
Very cool! The past couple of years I have usually had one or two male students per year who is/are red-green colorblind. Now I ask at the beginning of each semester and adjust the whiteboard markers that I carry around.
I don't get it. This sounds like the student was saying that when something was written in blue ink he couldn't see it at all. I've known a number of people who were color blind, but I've never heard of color blindness working that way. For instance, my boss was color blind, but that primarily meant that when I did charts in Excel I used different line segments and fill patterns rather than rely solely on different colors to distinguish categories. But, he could see
the lines/bars/whatever, no matter what color they were. He just couldn't always distinguish one color from another. The lettering didn't just disappear as though it didn't exist.