Although his swing looks a little loopy Jim Furyk is a great example of a one plane swing, he takes the club outside coming back but his delivery position is exactly on one plane.
Teach kids that with irons you must hit down on the ball to make it go up because the ball gains backspin by rolling up the face
Don't always pitch the ball when you have a bunker between you and the green, if the pin is in the back of the green it is always easier to chip, even if it is over the bunker