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Setting up a blog using Google's Blogger
is another option for sharing great information with your students and giving them a chance to engage with you and with each other online. I'm not a regular blogger, but if I had more time (and could find an audience beyond myself ;-) I would give it a more concerted effort: Lifelong Learner
Here is a link to Cool Tools for Schools
to help you begin your exploration for some other great tools to expand your classroom beyond its walls!