Maybe it is something you want to talk to your kids about too. Here is a great resource I found for parents. http://www.commonsensemedia.org/educators/parent-media-education
Just so you know as far as I can tell all of my students have been very responsible online at school and we do our best to keep them that way with various filters and security measures in place. I also want to add a disclaimer that I think our students are a WONDERFUL group of kids and do their best to treat each other with respect and kindness. Anything outside of this that I am aware of I promise to deal with promptly. Please let me know anytime there is an issue and I will do my best to help. Outside of that I think an ounce of prevention and a dash of support never hurts.