There are sometimes individual panel members who quite like to see exercise books, while there are others who are relieved to be spared!
I concur with that. I'm not, and never have been, a teacher, so apart from comparing the work with that of my elder daughter, there's very little I can glean from seeing piles of text books, projects and the like. However, the retired teacher on my panel can tell a lot from them (apart from constantly muttering about the spelling, handwriting and how standards appear to have dropped since her days!).
I'd take some, not too many, though. Note that if you miss taking - say - maths, we'll wonder why!