Indeed. I think it is good in concept, but like sayo and glider pointed out, who is responsible for mishaps? When it is in an open forum like this, we have the opportunity to correct each other. But students are generally confused when arguments break out amongst those trying to help. I know the last thing I want when I need help is TA's arguing over who is right (its happened before).
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Slightly offtopic, but I was considering sort of a newsletter type Q&A for school children where they wouldn't have to be a member of the forum to ask. It could be somewhat of a collective "community service" project for us . It wouldn't be too demanding of our time. I could set up a webpage where they can punch their question in and it would automatically create a post in a specific forum. We could pick the best answers and publish them either on a webpage or in a newsletter, or both. I think there would be a good deal of interest in it, especially among science teachers. The problem is getting the newsletter/webpage recognized. Hopefully some larger institutions already in place would help us out or something. What do you all think?