At my son's school , he is just about to start Year 4, I have never yet seen any exercise books that he has written in. We get a few bits and pieces of art at the end of term and that it is it. I have no idea what happens to the books year on year, but would love to have them to see his work and keep them as a memento, so will be enquiring in September about this. The school I teach in has had the practise (until this year) of keeping all the books for a year in case of OFsted and then binning/shredding them. I find this shocking as what value does it place on the work the children have done, but also know from quick straw poll of parents who are friends that they would love to have their childrens books. This year we have sent books home with kids, but it makes me wonder how common is this practise! What do other schools do?