How I Use It
I would use this site to have my students search for photos when they need them for projects or presentations. The photos are already cited, and are G-Rated. It is quick to find relevant photos for any number of topics.
This tool is more of a research tool than a teaching tool. You can choose to teach about citing sources properly, and why we need to give credit to photographers, but other than that, it is more of a repository of safe images to use. It has definite benefits, but not a whole lot of learning is involved.