I used a number of devices with different sizes. The 2.3" mini Android phone up to a 10.1" tablet. My current favorite form factor is 7". It fits into a cargo pocket or a (inner) pocket of a jacket (even a suit, but I guess that's not your concern). I currently use a Huawei MediaPad. Solid unibody, great screen resolution. Runs Android 3.2 (unfortunately they haven't announced when they will upgrade to 4.0). Huawei leaves the UI in its original state, so you get pure Android bliss. Biggest let-down: you have a separate charger, it won't charge through USB, so you need to carry an adapter. It is slimmer than the Samsung 7"

... later on in the workplace it is called "effective collaboration and asset reuse". Could it be, that the way test are administered is out of sync with live's reality and "cheating" the the adjustment to that?

Mondrian would be proud that Metro picked up his art: http://en.wikipedia.org/wiki/Piet_Mondrian

While to the best source for scientific accuracy, Effin's science did a similar experiment in episode 2, where texting detoriated attention even worse than drinking. http://en.wikipedia.org/wiki/It's_Effin'_Science

Get yourself a Blackberry and an unlimited international data plan. When I travel there the BB (albeit connected to a BES) can access any website, Facebook works, Twitter works since all traffic is routed through the BES. You need to check with your phone provider if that is true for BIS too. Beats fiddling with VPN and stuff by length. If access to all this doesn't matter: a cheap China Mobile prepaid SIM and a Xiaomi Android --- or a Huawei Ideos (a bit slow, so that's if calls is your main app).

use a Netbook Linux version. There's plenty in e.g. Edubuntu and the Game repository that points towards early math and early reading. Sugar as UI might be worth a try. And yes - be certain on the websites you allow. Less so about seeing people like god made them, but more about things people do to each other not covered by the 10 commandments (there's nothing in there prohibiting looking at a paradise suit, but a lot against violence).