Ive taught a lot of people I've never met over the internet with nothing more than asking them questions and explaining to them how to understand what is being said and why they don't understand. Its not the students its the instructors who don't understand. Its not what you know its what the student hears that most goes unconsidered. I learned a long time ago to teach my students how to disregard what a fly casting instructor says and understand what they mean. Its not that instructors are intenaly trying to confuse students they have just forgotten what its like to be the student.