I guess I should start at the beginning. Much debate has been done about what type of notebook to use. I prefer a one subject spiral bound notebook with a poly cover, 100 sheets, college ruled, with a pocket in the front. Other people prefer to use a composition notebook or a binder. I have found with a binder that pages tend to get lost no matter how careful you are about putting items in the notebook. With a composition notebook, the pages do not fall out, but space is limited. I have only had one or two pages fall out over the years and we just tape to the next page - problem solved.
My notebook of choice is from Staples. It is the Accel brand. They can be found on sale during the school year and especially during the summer for $2.00 each. The Mead Five Star ones work and are similarily priced. I like the Staples ones better because it has a clear poly folder in the front and a thicker spiral that does not get snagged on stuff.
Here is a picture of my choice notebook and a link to them at Staples. But...make sure they ARE on sale! Click on the notebook to find them at your local Staples.