I think one concern I would have is the type of language/pictures children would produce on the social web. And depending on the age/grade there would be different rules. -Some of which would be respect/you may not believe/ understand what this person is saying but please be respectful of our people's feelings/thoughts. Another is to respect yourself don't post anything that will degrade you ex. pictures of a weekend party. Another is to really think about/and write down what they want to learn/discuss and not to write down silly things. Another wuld be no personal chatting, the list can go on but agian it depends on the age group you work with