Hi,
My teacher's notebook includes a weekly schedule for my 3 dc (gr. 1, 2 & 5), a section for each of their "independent education plans" (a list what curriculum I bought for them, when I plan to use it and which days of the week I plan to use it on -- has cured the "what did I buy this for?" syndrome:D. Also, in each of their sections I include our first day and last day of school surveys (homemade) which they fill out and includes some of their favorite things and goals for the school year. We add a photo at the bottom. It's fun for all of us to see how much they've changed (in height, in appearance, and in faves). I might save a picture or note that they have given to me saying how much they like homeschool or how much they love me (little encouragements go a long way on discouraging days).
I have a reference section for me, and that's a hodge-podge of different things, from inspirational emails, scripture verses, my amblesideonline.com listing of composers and artists to study, to contact info, etc.
Last section is for testing since I'm registered as a test administrator with Bob Jones Testing.
My pencil case has binder holes so that goes in the front and has a highlighter, pens, pencils (for doing my schedule), correction fluid, stickers (for encouragements), and paper reinforcers (for those torn pages in each of our notebooks). Front pocket holds our attendance sheet so I can mark down our school days (I always kept count even before moving to a state that requires it).
The nice thing is that I believe there's no wrong way to make one. I encourage you to make it fit your personality and be a reference point for you.