A working Palm m105 can be had for $25-35. "Typed" student papers (Graffiti'd in) could be transferred to your computer by IrDA or a serial cradle. If you're willing to reformat electronic readings to ePub format, readings can be transferred to students the same way. "Notes" up to 4kB hold about a page and a half of single spaced text. Small but readable screen, free applications that raise the limit on the editor to 32kB (about 12 pages single spaced). A pair of batteries lasts 1-2 weeks; using the IrDA is the big current suck, so use a serial cradle for everything. The "supercaps" in the m100 series don't hold a charge while switching batteries, so the device resets. "Hotsync" to a PC before & after battery swap makes that irrelevant. For those who must keyboard, an attachable full-size keyboard that folds up to pocket size is another $35.