Linux is the open source software platform that continues to make inroads in the computing worlds. And many schools are now considering it as a no-cost alternative to Windows or Apple, too.
A site called Intrawebz (I am not sure if that is name of the publisher or the name of the site) has apparently put together some comics that explain the Linux operating system and the first issue about Ubuntu is available as a free ebook download. The second edition costs a few bucks, but there seems to be a way to bulk order for the classroom at some discount.
I am hoping to review the books for The Graphic Classroom in the future, but if you interest is piqued, go download the ebook yourself.
Peace (in comics),
Kevin