I’ll put in a different opinion and share my reasons 😉
We do use the notebook beginning with high school. Our reasons are pretty simple:
1. It gives a schedule that breaks the course down into daily assignments. This makes is easy for my teen to be pretty much independent with reasonable chunks of work already divided up.
2. It collects her answers to the on your own and other questions into one place, with the question directly above the answer, making for easy review.
3. We use it as a tool – which means we ignore the tests, adjust the schedule when we need to, and she gets to work on lab reports with the printed page structure there to guide her. Again, it makes my job easier.
There are many good ways to do science – this just happens to be the one that works for us when we use Apologia. This fall we’re not using it so we don’t have the support of a student notebook. (Makayla (11th) will be doing the new chemistry course by Jay Wile, which does include a suggested schedule in the back of the book, but there isn’t a student notebook available.)
For younger kids we haven’t used the student notebook. We do the elementary books as a group, I read aloud, they narrate orally or with drawings, we do experiments together. In junior high age they can narrate in writing too.
This fall we’re not doing Apologia at all. My 7th and under crew will be doing a literature based science I’m creating based on resources we already own. (That will be the 7th, 6th, 4th, 3rd, 1st, K, with 2 preschoolers tagging along and a baby joining us in Jan.) We’ll do some experiments too.