Flickr is a website that allows you store, sort, search, and share your photos online. The free version of Flickr allows you to upload up to 20MB of photos each month (a paid version with a 2GB limit is available for $24.95/year).
In addition to being a place to host your images, Flickr is also a community site. All images uploaded to Flickr that have not been marked as private can be searched using the tags (labels) associated with them. You can also search for and join groups to view photos from other users that match your interests.
Flickr has a section for photos that have been shared with a Creative Commons license. This is a type of license that allows teachers to use images found on Flickr in classroom projects as long as they cite the person who took the picture (the conditions of use will vary depending on the type of Creative Common license).
