There is no better way to learn box making than from a pro. Doug Stowe has been teaching week long box making classes at various craft schools since 1998 and is also available for weekend classes at woodworking clubs. This year, he is scheduled to teach week long classes at Marc Adams School of Woodworking, and the The Eureka Springs School of the Arts. Check the websites for dates, course descriptions and available space.
If you are interested in a weekend workshop for your club, Email Doug to discuss dates dates and estimated expenses. Doug has taught in many of the finest woodworking clubs in the US. His teaching schedule can be found on his website, DougStowe.com
Box making is one of the best ways to learn woodworking in general. Boxes allow for experimentation in design and technique, using far less material, in less time and in less physical space. If you want to become a better woodworker in general, try box making.