This post at Mind Hacks about the extended mind idea has me thinking about what it means for schools if we accept the premise. When we put children into a new classroom every year then we effectively wipe out their ability to externalize their mind. We cut them off from the possibility of school enabling them to maximize the benefits of externalizing. They know that whatever investment they make in utilizing this year's classroom as a medium for extending their personal capabilities, it will be wiped out at the end of the year.
That's not good.