California's recent announcement that they are moving to e-textbooks will mean a lot more resources for 1:1 schools. Right now, using a tablet computer means either having a CD copy of the textbook (now a departmental requirement for our texts and fortunately most Ontario publishers have agreed) or several hours spent at the photocopier, scanning the questions in. Some publishers copy-protect their CDs but in the age of snipping tools, it's a lost cause. I understand they're concerned with sales but a quick check of class lists will ensure they're selling what they should.
Since my students have tablets, I use a OneNote file each day for their work: I get to pull questions from the textbook and sequence them the way I want. I can also make different levels of homework depending on the students -- this is particularly nice and, since the students don't necessarily see each other's OneNotes, they don't know who has what. I also put the answers from the text at the bottom of the OneNote for their reference. With OneNote, of course, I can also add in links to resources for the questions, my only little running commentary (either helpful hints & tips or notes about the phrasing of the question, where to find other questions like this and so on. Images, videos and applets can also be incorporated. It's this kind of environment I'm hoping that California will come up with.
I know that many of the math teachers don't do this; it's another little bit of work each day. I just find it inefficient to ask the student to copy the question from the textbook (since an answer in isolation is useless in review) and then flip to the back of the book for the answer. Not to mention most desks don't accomodate a math textbook and a tablet computer (and a soft drink, chips, ipod, etc).
Some teachers do it for the whole unit; I find that a little wishful thinking. So many good questions & thoughts arise from class that I like to tip them in either the same day or the next day -- and it's not just the math stuff I put in, either. Current events, humourous things from them... it all adds a little bit to the work.
If you're a math or science teacher, OneNote is likely only effective if you have a tablet (or a plug-in tablet as I used to use). For other subjects a laptop or netbook would be sufficient.