That's true, you can't see.

Today I had to talk down to a class. They're under-performing, whining and not being very pleasant to be around. So, I laid into them a bit. Afterwords, it was a bit tense.

After the "talk" (which I rarely do), I began the lesson. In the lesson students had to use the quadratic formula. I wrote it on the board in the top left corner and said, "I'll go ahead and write it on the board so everybody can see it clearly."

The blind student said, "Everybody...?"

That really broke the tension. We had a good day from there forward. Best day yet actually. Hopefully it will last more than a few days.

A few weeks ago, in the same class, students were complaining that something on the board was blurry. So, I asked the blind kid if the board was blurry. He played along, without even knowing I winked at him and said, "not at all."