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the tracking of consumers has grown both far more pervasive and far more intrusive than is realized by all but a handful of people in the vanguard of the industry. • The study found that the nation's 50 top websites on average installed 64 pieces of tracking technology onto the computers of visitors, usually with no warning. A dozen sites each installed more than a hundred. The nonprofit Wikipedia installed none.

the Journal found new tools that scan in real time what people are doing on a Web page, then instantly assess location, income, shopping interests and even medical conditions. Some tools surreptitiously re-spawn themselves even after users try to delete them. • These profiles of individuals, constantly refreshed, are bought and sold on stock-market-like exchanges that have sprung up in the past 18 months.

Advertisers once primarily bought ads on specific Web pages—a car ad on a car site. Now, advertisers are paying a premium to follow people around the Internet, wherever they go, with highly specific marketing messages.

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While used textbooks are obviously less costly, they often carry another benefit new textbooks don't: highlights, underscores and other annotations by their previous owners. Even though the author of, and rationale for, the annotations may be unknown, the fact that somebody found particular sections of the book important enough to emphasize tends to make the eye linger. Ideally, annotations can make learning and knowledge discovery feel less like a solitary pursuit and more like a collaborative effort.

At first glance, it would seem that the trustworthiness of an unknown individual who has interpreted or appended an author's work would be questionable, but several reasonable assumptions can be made that contribute to the perceived authority of an unknown annotator. At the very least, they read the work and took the time to make the annotations, which may question or clarify certain statements in the text, and create links to other works, authors or ideas. The subsequent reader of an annotated work then has one or more additional perspectives from which to evaluate the usefulness of the text and annotations, and more implied permission to add his or her own interpretations than in an unannotated text. Published scholarly works are objects for discussion in an ongoing conversation among a community of knowledge seekers, and whether via formal citation in later publications or annotations in existing ones, all are designed to advance the generation and exchange of ideas.

Most critically, knowledge discovery and transfer is no longer restricted to a model of one expert creator to many consumers. In Web 2.0, consumers are creators, who can add their voices to both expert and non-expert claims. Users get the benefit of multiple perspectives and can evaluate claims in the best tradition of participative, critical inquiry.

While I was reading this article I was very critical and was wondering whether this course was going to be just lecturing by simply recording and showing the lesson and how these two professors could assess so many students in terms of time and in terms to have an assessment which would not make them cheat as this is an online environment. Well, in the last part of the article the answer is clearly expressed they do show a recording but on the online lesson they actually use the lesson to discuss project in smaller groups. Do not personally know how many smaller groups they would create and of how many members however the idea is excellent to me.