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This is the first in a 5 part series on derivatives. Its meant to be a simple explanation to help students out that need a refresher or simply or a short understanding on the subject.

I teach 7th grade and integrate tech with math and CCSS

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Are you a veteran? active duty? spouse? thinking about college? Join VetOut one week from today in a hangout to discuss why your college placement exams are so important. Find out about VetOut's FREE college math placement prep program that can save you valuable time and money.

VetOut Math Boot Camp prepares students to pass the Mathematics College Placement exam, and is free for active duty service members, veterans, and their families. Join the IZZOmath team for a little live VetOut Q&A using google+ hangouts on 5 March @ 2000 EST. Our next math boot camp kicks off on the following Monday, 10 March.

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Everyone has seen how the car windscreen wipers sweep the water away quickly But did you ever think about how they work? There is only one fixed point, it is attached to the long arm of a lever with a brush that adheres to the glass. If there is an engine that can operate this mechanism, it must turn in one direction, then stop suddenly and turn in the opposite direction. But how it is actually built on the wiper mechanism? If you open the hood you can see that the wiper motor always rotates in the same way, all the time when it is activated. But it is a planar hinge mechanism, called windscreen trapezoid, that rotates now in one direction, now in the opposite one. What is a planar hinges mechanism? In short, it is made of bars of different lengths arranged on a plane and connected at their ends by nails. In practice we encounter them everywhere. The research on hinges mechanism in mathematics began at the time of the invention of the steam engine by James Watt and continue in our time. Mathematicians of the twenty-first century proved the “signature theorem”: there is a planar hinges mechanism that forges your signature with any precision. http://en.wikipedia.org/wiki/Watt_steam_engine

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Hello all! I teach math 8th grade math in Northern CA and also assist with technology integration and training throughout my district. Thought it would be helpful to have a site to assist teachers as they transition to common core and use Chromebooks or other Google app features. So if you are interested in creating a math technology community to help one another please join.

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