From Education Week:
“[It’s] the perfect storm for re-imagination of the K-12 textbook.”
— Doug Levin, the executive director of the State Educational Technology Directors Association, arguing that Common Core State Standards, budget pressures, student demographic changes, and other factors are changing how instructional materials are designed and delivered.
UPDATE 9/27/12: There may be some connection here to this rare weather phenomenon:
(h/t Ryan Avent)