Thomas showed her initiative by teaching herself to organize and lead an online seminar -- a Webinar -- aimed at showing doctors how to better communicate on TV.

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Terence Tao, a University of California, Los Angeles mathematician and winner of the prestigious Fields Medal, has turned his blog into an online graduate math seminar open to the general public.

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Critics said the firm lured consumers to a free seminar, then pressured them to spend money to access information readily available free online or in libraries.

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