Plate tectonics

For a very detailed and informative explanation of plate tectonics and the structure of the earth try these two links on the Moorlands School website.
For some beautiful satellite images of volcanoes have a look at the NASA site.

Map skills

If you need to revise your map skills follow this link for help.
You can then try out one of the Ordnance Survey's tests on their excellent website. You can do them on directions, scale, symbols and grid references. Take a test and if you do well enough you can play a game too.
Here is a useful link to the symbols used on a 1:50,000 OS map. You will also find the symbols in the back of your text book.