I think I had an INTj math teacher and I had absolutely no problem understanding him/passing his tests. I even liked the fact that he presented the material trying to convey us an understanding instead of a mere step-by-step procedure. I don't think that transmitting information via mental images is a bad means: it worked wonders for me. Though I've seen especially ISxjss stuggling with it.

The real pain was the ISTj one: he kept telling me that all the lines I had to trace on the blackboard had to be STRAIGHT. So every time I had to do an oral little examination, half of the time was spen by him telling me "STRAIGHT LINE!". Of course I didn't do that well in the class. He was really funny though.