Geography
Here are some useful sites linked to maps
http://earth.google.com
(download a small piece of software to your PC first)
www.multimap.com
(try aerial to overlay an aerial photo)
http://maps.google.com
(scroll across the map to trace the path of a river or road)
http://moon.google.com
(zoom right in to PROOVE what the moon is made from)
www.mapzone.co.uk
(a useful site from Ordnance Survey- KS2 and 3)