Try the reMarkable2. Seriously. I got one a few years ago to do math on/jot down any of a million ideas, because I am always losing papers. As soon as I got one I knew I needed more for the kids because keeping homework straight was a nightmare.

It actually helps with the perennial "show your work" problem. We still have that, but the mental block of trying to be space efficient is removed. They can just scroll the page further down or add a page. Also there is less hassle in fixing mistakes since, unlike pencils, stylus erasers don't leave a mark.

The only bugger with remarkable is that they are very locked down. That is the appeal. Apps are a distraction, but it would be nice if I could have the files rsync to another device or something.