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So do lots of other people. 100+ Google Tricks for Teachers
I plan to have a good look at the features of knol, since there have been some improvements reported.
Where can I ... search effectively? Is a very useful post. Although, in my view, for both students and teachers the more important question is probably how do I search effectively.
Additionally, the concept of safe searching must be addressed in the school setting.
I'll keep this post as a work in progress ...