Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P
I think this would be a great problem dealing with rates. That is, if you know how much energy it takes to hit a key on a keyboard (1.5 mJ/keystroke) then how about if you type an essay, or write a book. At What if they asked that question and determined what kind of energy output typing out a whole book would be (and more). But don't let them do the work, have your kids do the same work on their own.
Curriculum Tags: Gr7, Gr8, MFM1P
I like when it is possible to take the abstract and make it visible. So it is with this recent post from Timon Piccini. We have all certainly talked about the "balance method" for solving equations and maybe even played with some virtual balance apps (here, here and here). But in this case the method is to use actual scales. He does talk about some of the difficulties and limitations (and is looking for input on how to fix them) but gives all the handouts, video files and power points. Take a look at the video below which asks how many pennies does x equal if you get some evidence when you split x up evenly in to four different cups (I think the stack of pennies is 10)
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P, MFM2P
Curriculum Tags: All
Did you know that there is a mathematical way to choose a port-a-john. Of course there is and Numberphile is gonna tell us how. The thing I like about this is it really exemplifies the idea of trying a simpler version of a problem to develop an answer for the more complex problem. Some goodcombinatorics in this one.
Curriculum Tags: MDM4U
here for his original Google+ page. Either way, its some cool data.
Curriculum Tags: MBF3C, MDM4U