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Some Colleges Now Offer Massive Open Online Courses (MOOCs), Where

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Some colleges now offer massive open online courses (MOOCs) , where students do not need to be in the same classroom as their instructors.The fixed cost of an online course is relatively ________, but after the courses are placed online, the marginal cost of providing instruction to an additional student is ________.


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A social unit consisting of parents and their children, considered as a group, whether dwelling together or not.

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