Simple FlickrCC Search is a way to search for, and stamp with attribution, Flickr images that you can use. It is designed with school pupils and mobile in mind.
You can use the images in blog posts, presentations etc and not worry about attribution. You can also generate an html embed code with attribution and link to the source flickr page,. this can be pasted into an html/text blog editor.
Here is an example stamped image:
And here is an embed code example: