Learning to Think Spatially

I got wind of this from an EDU list but thought it was worth sharing. The national academies press not only sells books but also has complete titles available for viewing online. OF interest, this title called Learning to Think Spatially: GIS as a Support System in the K-12 Curriculum (2006). The book delves into the concept of Spatial Thinking and also takes a look at Spatial Thinking in the k-12 context. Check it out at http://fermat.nap.edu/books/0309092086/html/