UPDATE! (6/9/2011) The following link will take you to my new digital citizenship and internet safety resource site that provides resources divided by grade level (K-12): Be Cyber Intelligent.
Digital citizenship and internet safety are important topics to address with students. There are several online resources for varying ages that have excellent information, activities, and support to address these issues.
X-BLOCK (iSafe kids zone)
The following are good for elementary age students: