Japan will soon start trialling electronic textbooks in primary schools, enhancing the role of IT in the classroom for a generation of "digital natives" born in the wired age.
Free high schools text books for Maths and Science - available from Amazon, or as pdf - could be loaded onto the iPad
CK-12 People's Physics Book Version 2
CK-12 Life Science
CK-12 Engineering: An Introduction for High School
CK-12 Earth Science
CK-12 Biology I - Honors
CK-12 Algebra I
CK-12 Advanced Probability and Statistics
CK-12 21st Century Physics: A Compilation of Contemporary and Emerging Technologies
Comment from a teacher on a list I belong to:
I have had a look at the Chemistry ebook. It is a good reference for senior students (and their teachers) seeking extension and deep understanding. The illustrations are informative and attractive. It pre-supposes a thorogh year 10 knowledge, and does not build concepts from
the ground up as is necessary for the NSW Syllabus. It includes terms that NSW students do not encounter until the HSC course in Year 12. The book also provides students with extra calculations, extra readings on the web and sources of videos. If my students could answer the questions in this text I would be ecstatic (and redundant)
Create your own textbooks?
Have you seen e-readups?
It basically allows the user to select resources from wikipedia (more available if you ask for an account) and then generates an e-book in .mobi and epub formats. The resultant e-book has a hyperlinked table of contents. I could imagine it could be very usful on almost any topic, so long as you trusted the content.