You don't gotta know **** man, as long as your students are just starting out. tell em to go buy a beginners book and just work through it with them. Give em homework like work on excercise 1 through 7 and of course they won't do it because they're punks and then you'll do it all over again for 15 dollars a half hour lesson the next week (canadian) and you'll ponder what the point is after a few years.