Last year a group of UK teachers started working on a Creative Commons licensed teaching manual for the Raspberry Pi
. That work has produced the Raspberry Pi Education Manual
which is available at the Pi Store or here as a PDF
. From Raspberry Pi: "The manual is released under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 unported licence, which is a complicated way of saying that it’s free for you to download, copy, adapt and use – you just can’t sell it.
You’ll find chapters here on Scratch, Python, interfacing, and the command line. There’s a group at Oracle which is currently working with us on a faster Java virtual machine (JVM) for the Pi, and once that work’s done, chapters on Greenfoot and Geogebra will also be made available – we hope that’ll be very soon."