I had a friend that took a 2 hr private lesson from Cathy Church. Cost him $150 bucks. She examined his camera and gave him some pointers regarding HIS PARTICULAR CAMERA gear for about 30 minutes.
Took him diving for about an hour. She'd point to something and then shoot it with his camera. Then she gave it to him to do the same. Repeated the same steps over and over on different subjects and objects. Even pointed out the settings for most of the shots.
Got back and then went through both of their sets of pictures, pointing out what was wrong with this one, how to make that one better, etc. She went over the settings again for each shot. He said he was in awe of the personalization and patience of the legend herself. He took notes, and got way more than his moneys worth. He's a pretty decent photographer now too.