A good swing starts with a well balanced and solid set up
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
There should be a slight weight shift in the swing, very minimal going back to your right side on to the inside of your right leg followed by a subtle bump to your left side on the initiation of the downswing getting the weight forward and eliminating fat shots