At K-14 education level, dominant emphasis is "building learning communities" and tools to support collaborative learning
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Fully interactive; semi-interactive (as in MOO model) or possibly asynchronous
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Working through NCSA Alliance with NSF CILT center
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2.5D Chat is perhaps a nice tool here
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Web collaboration is central to many other applications
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Thus there are many leverage points
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Synchronous teaching a good place for early deployment of collaborative tools as relatively structured and so less sensitive to immaturity of systems
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