Ordnance Survey Maps try get-a-map and free outline maps, plus details of all the latest O.S. products.
National Geographic Map Machinean excellent site which makes all sorts of maps.
Expedia Mapsall sorts of maps from all over the world
Multimapenter your postcode (or any postcode) and get a map...
Map Skills:
Ordnance Survey Mapzone O.S. has just launched a new section called Homework Help. This is a fully interactive web site designed to help geography students at key stage 3, with map reading skills.
ScaleCentre for Topographic Information (Canada)- a simple explanation of how scales work on a map.
Map TermsCentre for Topographic Information (Canada)- a glossary of words used in mapping.
Map SymbolsCentre for Topographic Information (Canada)- useful examples but remember they are not all the same as those on UK maps
ContoursCentre for Topographic Information (Canada)- a simple explanation of what contours are.
Using a CompassCentre for Topographic Information (Canada)- starts off with a complicated explanation of 'why north isn't north' (!) but at the bottom of the page is a useful section on how to use a compass.
Ian Murray, Geography Photo Gallery - a growing collection of photos from around the world which can be freely used for educational purposes