I just discovered a really nifty tool for anyone interested in using, or just browsing, some of the iconic photos from Life magazine. Google has an online photo archive of millions of photos that are part of the Life photo archive:
"Search millions of photographs from the LIFE photo archive, stretching from the 1750s to today. Most were never published and are now available for the first time through the joint work of LIFE and Google." (from the Google/Life photo archive website).
This resource is perfect for school projects, or for any research project that requires photographic documentation. As a bonus, framed images can be purchased if you just like old photos, and you want something interesting to hang on your wall. The images are tagged so that searching within a subject is made easier. Here's an interesting blog post about the archive.
The photos are searchable and organized by decade. To search and view the collection, go to http://images.google.com/hosted/life