Today we went for a hike in the Muir Woods. It was fantastic scenery, with old Redwoods, and we picnicked at Camp Alice, where the first UN meeting had dedicated a memorial to FDR. Some of us went on a longer hike afterwards, to the top of the ridge then down into Mill Valley, which is a funky little Californian town. Here, David Wiley contemplates how OER can change the world (or maybe just has a rest)