I like to include data, evidence, objects, drawings, artifacts, diagrams, reading material that relate, and foldables.

Not a direct answer from me, but more of a helpful tip: when I do paper notebooks using a spiral or composition notebook, I have the kids cut a triangle off the top right corner (diagonally across the box made at the top of the margin) each time we added or used a new page. This really cut down on my 5th graders who would slap foldables and notes anywhere in the spiral. They would put their finger on the blank space their cut provided and be able to immediately flip to the next clean page!!!! It sounds silly, but, man was that a game changer for me!!!!

That’s a great tip!! I use duct tape and tape a length of ribbon to the inside of the back cover and we use that as a bookmark. In Kindergarten is saves us from also finding a random page and sticking new information in. At least this way, we can find where we worked last and then we all flip to a new page TOGETHER! Sometimes the page skipping still happens, but this helps A LOT!