http://www.csdl.tamu.edu/walden/walden-intro.html:
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Walden's Paths lets you organize World Wide Web material for your students' use. You can collect resources from widely-separated sources, annotate them, and bring them together into a single path. Students following the path obtain a cohesive view of the collected material, and may browse off the path freely, with the assurance that a single mouse click will return them to the path.
