For the tutor who is Expert level and above. I've discovered a better method of teaching one-on-one lessons. Instead of having the student show his game to you and then you explaining move-by-move what he/she should've played, it's much more effective to do this:
Sit down with the student and have the student show you the entire game. As they read it from their scoresheet you tell them, "Now as you show me this game I'd like you to explain your reasons for each one of your moves." So they show you the game and at some point they will ask you what you think about a particular move? You tell them that you'll explain all the moves in a minute, but right now you are interested in what they thought about the position.
After the entire game is shown then you set the board back up and go through each move. You make a comment on every move that they made a comment on and also evey move that was bad and explain all the sidelines of play available to them that were better. Obviously, you didn't make any notes or use their scoresheet to do this. If you can't remember their game and comments then this lesson is not designed for you. Most players of Expert ability can do this without a problem. It fortifies the student's confidence in you as they realize that you have not only remembered their game and their comments, but also the sub-variations to their game.
So why is this a better method than the usual one? It does three things:
1) It allows you to get a better understanding of where the student needs help. This is because any comments you might've made during their presentation could alter the way they interact with you.
2) It fortifies in the mind of your student that you are quite talented and they will have more confidence in what you tell them.
3) They realize that if you can do this, they can learn to do it. Once they learn to do this trick it helps their minds remember openings, strategy and positions during tournament play.