Tags » Math

Amazing Math Magic Video

http://www.ted.com In a lively show, mathemagician Arthur Benjamin races a team of calculators to figure out 3-digit squares, solves another massive mental equation and guesses a few birthdays. 324 more words


When A Sine Wave Is a Circle

When y=sin(x) is plotted on a polar coordinate system, with everything set, consistently, to radians, the resulting graph is a circle sitting atop the origin, with unit diameter.


¡Amamos triángulos

Triangles and fairy tales go together like wolves and pigs.  As teachers, we revel in their many symbiotic relationships: those trichotomous pigs, questions, bears, problems, porridges, knocks at the door, and stepsisters inspire us to view the three angles and lines of a triangle in a multitude of ways.   150 more words


Math Problem of the Day

I’ve seen this idea many times before, but I’ve most of the pages I’ve seen are too “cutesy” to get away with in 6th grade. I made this one that’s pretty standard and has enough space for kids to adequately explain themselves. 78 more words

Elementary School

Speed Up Factor

I watch a lot of Coursera videos and usually view them at 1.25x or 1.5x normal viewing speed. I started thinking about how much that would translate into viewing time. 258 more words


Quiz! Open Notes and Books

By Vic Odarve

Have you heard a teacher informing the class that your next quiz is open notes, books, etc.? It is really almost open everything! 650 more words