Hi Billy,
Learning to communicate is essential. I think using practical examples from whatever caeer field the class is studying helps make your class topics more effective. Of course the need to know a little about their field helps immensely. Asking knowledgeable teachers from these different disciplines to list the 10 most important topics from their field, or providing a narrative that describes their profession with specific tasks and/or skill sets required for the profession might help become more informed.
Barry Westling