Jim,
You might want to check out the materials that I have developed. My two text books for soaring students are the "Glider Pilot's Handbooks of Aeronautical Knowledge", and the "Flight Training Manual for Gliders". The first book covers all the knowledge areas, and the second covers flight training.
I wrote both books for a high school audience. At the time I was writing the books I was helping to create the Youth Soaring Academy, a non-profit organization that assisted 14-18 year olds in getting their glider license. I made sure that the books covered all the information necessary for a student to make it from their first flight, through getting their Bronze Badge.
More recently, I have been developing online courses to compliment the knowledge training, and a sim platform and lessons to aid in flight training. The interactive nature of the online courses and sim training seems to appeal to younger students.
You can find more information about these materials at my website,
http://www.GliderBooks.com, or if you like, I would be happy to discuss them with you. You can email me at
.
I hope this helps, and am glad to hear that you are doing something to increase the number of young people in soaring.
-Russell Holtz