This is one of the best Creative Commons resources that I have found! It provides a thorough overview of the different CC licenses in a variety of different charts that are easy to read and understand. It also breaks down commonly asked questions regarding the use of photos and attribution, focusing on Google's photo tools. Finally, it provides good options for online photos for teachers and students so that they are aware of and following CC licensing laws.
We all discuss plagiarism with our students, even at the youngest levels. Although this is meant for older audiences (MS & early HS), this interactive tutorial is a great, quick way to review some of the most important elements when avoiding plagiarism. It can be done together as a class or used as an independent self check.
One area for which I'm always searching for more resources and information is resources that can be shared with parents and families to support the digital citizenship learning students are doing in the library. Just because most parents many parents are comfortable with technology, that doesn't 'mean they know how to talk to their children about internet safety and ethics. This includes a good list of resources that are available.