when I've been studying Genealogy such documents would be of tremendous value, think ahead a few generations and someone in the family will be researching the family tree - why not take a couple of the school reports, any other interesting paperwork relating to property, employment, old diaries etc. Include some old photographs with a letter explaining who the people are and how related, even a written potted history of what you remember about past generations. Seal the lot in a biscuit tin and hand it down in the family to be forwarded to each generation!