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] " Stephen Wolfram 's videoconference was a very interactive and extremely exciting event that lasted three hours and ten minutes . Again there must be some mindfulness at the very quiet and still stage before absorption . In addition , teaching is constructed as a highly situated and highly interpretative activity that requires teachers to figure out what to do about a particular topic , with a particular group of students , in particular time and place . But it is also a denotatively social and therefore political practice .