Sure enough, th 4th page of GOogle i mages sends you here - about 12 or so posts down. "I chose it because it said 'no way,' which is a comment my students make when I require them to show each calculation," he wrote in an e-mail. "I had no idea that I might offend anyone. I am very sorry for any distress that this has caused my students and the community."
He probably didn't intend any racist meanings. That doesn't mean they won't be found though.
The caption to that pic had this "OH MAI GAWD YOUR FRIEND CAN MULTIPLY AND DIVIDE?????".
Pretty stereotypical stuff. Now the only question you really have to ask yourself is this. If you were a teacher and there was one black student in your class, would you have used the pic?
I didn't think so.