This is largely a secondary sources (which I usually avoid - largely because I figure you've all already got enough of these in the classroom and library so primary sources are more valuable) however the information looked pretty good and it is easy-access for students. That's always a good thing. It has some timelines too.
I usually avoid sites like this (wikis, encyclopaedias, etc - they're easily found) however this one has photos from the Great Depression so I thought it worthwhile. The faces are harrowing.