Elementary math videos and songs. Try the 9 X 9 song to get a hint of how good these are. His whole site is great for every classroom. Teachers MUST use more music and teaching videos to make the quality of their lessons better. CW
thinking maps. Different options for different year levels. Could be fun revision for Year 12 - e.g. options could be derivative, primitive, graph, domain and range, odd/even/neither, inverse, is it a function?