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With more than 16 Emmys® to its credit and legions of fans, it's easy to see why the Bill Nye the Science Guy Series is one of the most popular educational series of all time. Beloved by teachers and students alike, Bill Nye and his unique brand of Way Cool Science make complex science principles accessible for all learners. In Friction Bill illustrates how various types of transportation use friction, from the use of traction in trains and the roll of ball bearings in skateboards and automobiles, to the lack of friction in a hovercraft. Correlated to National Science Education Standards for grades 4-8, this Classroom Edition DVD includes Public Performance Rights, exclusive interviews with Way Cool Scientists, and printable educator's guide complete with assessment tool.