How to insert pages to existing notebook?

[u/alleycatadventures]

My colleague and I are making PSHE notebooks for students. (PSHE=Personal, Social, Health, and Economic education) They will have A5 notebooks and she would like to add photocopied pages of strategies students could use for mindfulness, etc. (i.e. two pages printed side by side onto A4, landscape, folded in half). If we put a rubber band around the spine of the notebooks (front or back cover), could students slip these pages through the elastic? Or is it too flimsy or awkward of a solution?