I've recently heard about a way of encouraging boys to write and I quite liked it. The idea is that you create a writing corner with photos of any men who work at the school (or who are linked to the school if you don't have any men - dads, uncles etc will do). The men should be writing in the photos - it's fairly quick and easy to set up and apparently the boys love it, especially if backed on Cars wrapping paper or something equally appealing to the boys. Of course, there's no reason why you shouldn't also create a similar area for the girls. It could work for reading too.