Choice of tablet?
I would also be able to have images and data on the tablet screen for small group work, without having to disrupt the rest of the class.
I own an iPod, and have played with an iPad at an Apple store, and borrowed a friend's iPad, so I know it will do the job for me.
What about Windows / Android tablets, though?
The last Android device I used was very glitchy, but that was a year ago. Has it gotten as stable as iOS?
Of specific interest, do Windows or Android tablets start up from standby as fast an an iPad? If they're slow, I might as well dig out my netbook.