Other
The Chernobyl Nuclear Accident and It's Ramifications
An excellent series of reference papers on the worst nuclear accident we have had. Maps and a photo gallery are also provided.
PBS
Pbs Teachers:nordic Sagas: Radioactive Reindeer
Demonstrate how soil absorbs radioactivity by simulating the absorption of the radioactive isotope from the Chernobyl disaster into the lichen of Scandinavia. Use a chart to figure out the half-life of the isotope.