The Futures Channel offers science and math lessons for gradeschool kids based on compelling real-world examples. In this case, it's the recovery of the black-footed ferret. Not only does it have lots of pictures of an incredibly cute animal, but it explains how the species came back from the brink of extinction (indeed, it was presumed to BE extinct twice), but leads into math and science problems as students consider the population growth, variables involved in recovery, etc. Great stuff!
A couple more examples: