Actually my wife subscribed to JamPlay to get started with slack-key, and I look in once in a while. (While I
could teach her, we have learned the hard way not to try teaching each other
anything). I've certainly picked up a few things from Mark's JamPlay lessons, but it has been a long time so I don't recall the sample lesson content. Usually a sample lesson is not the absolute beginning stuff, since they try to draw a wider range of players.
We know Mark well and have studied with him at various camps and workshops. I've been playing slack key since about 2003, when Mark first introduced me to that style in Alaska (!) at a festival workshop. We've also studied indirectly with Keola Beamer (Homespun DVD) and then directly with Keola and several others at Aloha Music Camp. I've also heard good things about his on-line courses, but have never partaken.
The JamPlay lessons are good and well worth an annual subscription. Another great instructional resource is Keoki Kahumoku's DVD's. He does a superb job of keeping it "beginner" whereas most instructional DVD's stay at the beginner level for about five minutes and then immediately zoom forward into intermediate levels. Then build on that with his intermediate Slack Key title.
http://www.theguitarworkshop.com/keoki-kahumoku/The other titles there are also good too. I have them all, including the blues DVD's. I especially like the way that GTW shoots the videos - you can see the teacher's hands easily. Every instructional video should be shot that way, IMO.
