I love a good notebook. I prefer composition style but my boys use spirals at school. These come in so many colors that my two high schoolers can have a different color for every subject and none the same between them! Make sure you stock up during the summer because they are not cheap in March when you need two more.
Made of paper and terrific for pen or pencil. Requires no battery or electronics. May require artificial lighting to use when it would be otherwise dark. Seriously I'd much rather write my thoughts ideas and lists and take the notebook with me and sit quietly reviewing or writing outside and not be encumbered with my smart-this or smart-that while doing that. A notebook sized like this is just fine for my needs.