The Powerhouse Museum is the first museum in the world to release publicly-held historical photographs for access on Flickr, one of the largest online photo communities in the world. There may be some location and activity shots relevant to your work. For example, there are some interesting land clearing shots, histroical buildings, farming and agricultural images. Also with all these images there is a Creative Commons licence. This license means that you can republish this material for any non-commercial purpose as long as you give attribution back to the Powerhouse Museum as the creator and that you do not modify the work in any way.
<http://www.flickr.com/photos/powerhouse_museum/2469701212/>
This is a great resource and easily accessible for students and teachers.
Thanks for that great resource Britt, I think with a lot more attention being paid to copyright issues these sorts of resources will become invaluable to teachers.
Thanks this is a great resource. The Powerhouse itself is a wonderful resource.