I use a lot of Dinah Zike foldables in my science notebooks (pictures coming soon). I highly recommend purchasing her books. I used the elementary science book above and used it a lot in the elementary school and middle school (I have the middle/high school science book as well...which is currently on loan to my son's high school biology teacher). My social studies teacher uses Dinah's social studies books as well.
My favorite books are:
Dinah Zike's Big Book of Books
Dinah Zike's Book of Classroom Organization
Dinah Zike's Big Book of Elementary Science
Dinah Zike's Big Book of Middle and High School Science
All the books can be purchased online at http://www.dinah.com/
She recently developed a notebooking book (which of course I purchased). I got a lot of great ideas from that book as well. I am anxiously awaiting the publication of her vocabulary book for 3rd grade and up.