Flickr is an image and video-hosting website and web services suite. In addition to being a popular website for users to share and embed personal photographs, and effectively an online community, the service is widely used by photo researchers and by bloggers to host images that they embed in blogs and social media. Flikr has an advanced search function to allow searching for images that are under creative commons license. Flicker allows members unlimited uploads of images that are licensed under Creative Commons.
Help for Flickr – The Help – FAQ Support page for Flickr Users
Flickr for Education – 18 Ways to Use Flickr in Schools – A blog post regarding the many uses of Flickr as a photo sharing website in schools and education.