Science is one of those subjects, that we're on the fence when it comes to unschool or not to unschool. I generally like to follow the children's (or my own) interests into explorations and experiments, but I also like to keep an undercurrent of structured study going at the same time. To that end, last winter and spring, I had the children reading a science page a day from Dorling Kindersley's Knowledge Encyclopedia (known in our house as "The Great Big Book of Everything"), and then…