BBC Science and Nature - Prehistoric Life

Find out all about fossils, put your skills to the test by reconstructing ancient beasts, and find out what it's like to be a palaeontologist.
http://www.bbc.co.uk/beasts/fossilfun/

Jurassic Ammonites

A detailed description of discoveries in France, with illustrations, history, photographs and a section on myths and legends. [English and French]
http://perso.wanadoo.fr/jean-ours.filippi/anglais/

Mr B Bug's Trilobite World

An entertaining and informative approach to the subject of trilobites and their fossils, with animated graphics, audio, and quizzes.
http://www.geocities.com/mrbbug1/

Set in Stone

An article covers the history of fossil discovery in North America, and classroom projects illustrate the methods used.
http://www.blm.gov/education/00_resources/articles/paleo/