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http://www.funderstanding.com/k12/coaster/

http://www.cedarpoint.com/public/park/rides/coasters/index.cfm

http://library.thinkquest.org/C0113822/rc.html

http://www.quia.com/rr/110851.html

http://www.quia.com/cz/59306.html

http://www.quia.com/pop/99053.html?AP_rand=1217965704

http://wings.avkids.com/Curriculums/Forces_Motion/

http://www.exploratorium.edu/skateboarding/trick.html

http://www.bbc.co.uk/schools/digger/7_9entry/7_9.shtml

http://dsc.discovery.com/video/index.html?playerId=203711706&categoryId=1077953604&lineupId=1076645005

http://dsc.discovery.com/games/coasters/interactive.html