And, if you ask him now, he'd rather teach using pictures and real documents than have to use the textbook (although don't get him wrong, having a textbook would be nice, especially for guest teacher days and make-up work!).
Of course, you can start with google and just type in whatever your subject is. That is the no-brainer. But, there is a great resource from the US National Archives that has lots and lots of those documents just ready to use in your classroom.
Go to http://www.archives.gov/education/lessons/ it looks like this:
If you want some ideas on what to do with the pictures once you find one, take a look under the analysis worksheets section (on the right hand side of the page) and some great educators that work for the National Archives have provided some ideas for you and your classroom!
Tim loves to find historical pictures for his 8th grade US history classes and great pictures of history and everyday life for his Eastern Hemisphere 7th grade classes. The students really enjoy looking at these genuine artifacts. It really places them in the time period or foreign country!