On p.189 of Lankshear & Knobel’s New Literacies: Everyday Practices & Classroom Learning (2006) they cite the work of Naismith, et al. who suggest plotting commonly-used educational technologies onto two axes: static-portable and shared-personal. What they neglect to include is a graphic, which would have made a lot more sense.
Let me help them:
Interestingly, schools seem to be fine with technology that fits into the bottom-left space, but not with the top-right. Why? :-s