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But as the number of friends begins to increase—particularly over that magic Dunbar number of 150—the spell begins to wear off. At this scale, we simply can’t easily keep track of it all. When our number of connections rises above 150 everything becomes simply comments, as real conversations tax our already limited ability to interface with the network.

That mythical thing, social connection, doesn’t flow over these networks; information flows over these networks. The only reason the network ever felt meaningful was because, at small scale, the network operated like a community. But that breaks apart at large scale.

The thing about all these is that they’re not a shared experience—they are my experiences, which I am sharing with you, but you probably cannot experience with me—my thoughts or fascination with the article I just posted, the feeling of getting on that plane, or the thrill of watching the Sharks tie the game. Perhaps you can compare your notes of your own experience of these things; that’s what most Twitter conversation seems to be, to me, but the experiences are not shared. This differs from a discussion in a community, such as the type that occurs on SB Nation game day threads. The conversation does not center around any one individual’s experience, but rather the collective condition of the community. The conversation is the experience. Each comment is driven with the purpose of evoking and expressing the emotions that the community experiences, and particularly the ones they hold in common.

to train teachers to help students learn to read by transforming information for discovery and problem-solving.

all beginning teachers learn how to use online collaborative tools, video production tools, blogging tools, mobile tools and a variety of commercial and non-profit programs targeting the classrooms. Frequently young teachers know how to use these tools on a personal level but not in the classroom.

Let's building on national models like Communities in Schools, First, Computer Clubhouse, Club Tech of the Boys and Girls Clubs, and the Quest to Learn, Digital Youth Network and School of One models in Chicago and New York City.It is time to extend the learning day and create a place in every community where young children can gain confidence in their literacy and interactive technology skills.

laboratories for testing many different digital approaches to learning and assessment, as well as for testing different ways to break down the barriers between in- and out-of-school learning

a hub for the professional development of digitally savvy teachers.

embrace the potential revolutionary power of the digital tools that have defined the first decade of the 21st century