> train their student to fact check things like directions

In college I had a blind guy ask me how to get to some building on campus. I looked up and the was sign of the building he wanted into. It still took me several tries to get him useful directions. I know that I can duck under that railing..., but how to explain that - I still don't know. I did eventually get him there, but it is a lot harder than you think and I only needed to get him about 5 meters.