I like this image from Cool Cat Teacher. I looked at her blog, Digiteen Digital Citizenship, ISTE NETS-S, and ISTE NETS-T.
Here are my 5 topics that I would make sure I covered with my students in regards to digital citizenship:
1) Safety and Security: My middle school students need to be aware of the dangers on the internet, whether it is online predators or malicious software that can destroy their computers. I would discuss not giving out personal information, trying to talk only with people they know, and not downloading files from people they don't know. (Maybe discuss things to watch for in e-mails- don't open them if you don't know who they're from.)
2) Etiquette: Students need to realize that the same golden rule that we use in the classroom should be applied to the internet. I cannot tell you how many times fights and arguments have erupted in the halls, classrooms, or lunch room this past year because of what so and so said about so and so on MySpace. If you have nothing nice to say, it's probably best to not say anything at all.
3) Validity of websites: I go over this every time my students do a research project. I model how I check the validity of a website and use rubrics/checklists to see if this is a site that is really worth my while when I research.
4) Give credit where it is due: I think it is important for students to understand that plagiarism can spill over onto the internet. You can't take something and pass it off as your own work. The internet is a great place to share ideas and findings, but you always need to let others know where you got your information from.
5) If you put yourself out there, be prepared for criticism: Sometimes, our students think that they live in a little protected bubble. As much as we as teachers and parents don't want to see our children harmed, we have to realize that we can't protect them from critics. If they are going to be blogging on a public level or posting their work on YouTube, anyone in the world will be able to read what they have written or view their video, and some people may have some not so nice things to say. Students need to understand this and know that just because there are a few nay-sayers in the bunch doesn't mean they should give up on their dreams.