Paul Waggoner helpfully led the preparation of a Forest Identity Tutorial taking a novice step-by-step through the equation, the Forest Identity, at the heart of our November 2006 PNAS paper. The tutorial, Defining and Using the Forest Identity, includes some new analyses (for example, about Mediterranean forests), some new Forest Identity slides showing the power of the Forest Identity, and refers to a growing stock spread sheet with growing stock data for 144 countries in 1990 and 2005. Finally, the tutorial introduces our new phrase “Carbon Orchards,” which updates the notion of forests for the 21st century.