Below are some more links ..

Olympic symbols:

Brief overview of the meaning of the various symbols of the Olympic Games, including the Olympic rings, the Olympic flame, medals, and the Olympic oath. Includes images of Olympic mascots from summer games going back to 1972. 

The Beijing 2008 Olympic Resource is a national resource produced by the Australian Olympic Committee in consultation with teachers and educational advisors. The resource contains over 60 primary cross-curriculum topics and activities themed around the 2008 Olympic Games in Beijing, China.

Edgate: Gateway to the Summer Games
A US site but with lots of ideas about cross-curricular Olympic-themed lessons. It inlcudes about Athens, Olympic facts, Parade of Nations and Paralympics sections.

Timeline of Summer Olympics:

Moveable timeline with accompanying facts.

Canadian Olympics resources:

Their K-6  curriculum features a series of Olympian athlete stories that focus on the Olympic Values of excellence, fairness, respect and leadership. The secondary curriculum is comprised of cross-curricular project packs where students solve real life Olympic Games problems. Each project pack contains hand outs, teaching tips, an evaluation rubric and a list of links to provincial learning outcomes.

World Almanac for Kids – The Olympics:

Background and heaps of facts on general Olympics information e.g. individual event winners, times, dates, etc .. especially suitable for primary students.

Kodak Olympic History: 
Text enhanced with moving multimedia video and still images from the Olympics, 1896 to 1996. Use the timeline to access the historic photos.  Links at the bottom of page do not work.

NBC US TV network Olympic site:

Loads of current news, photos, videos, although with a slight US bent. Contains blogs and users comments which may not be appropriate for young eyes.