The good thing about teaching percents is that they connect to the real world, particularly with money. The bad thing is, it can be hard to find really [...]
One of the beautiful results in mathematics is the proof of the divergence of the harmonic series. What it tells us is that the infinite series of [...]
The grails of math activities, for me, are those that involve almost no special knowledge to get into, but have near-infinite depth. (Like this one.) We [...]
I’ve been immersed in puzzle and lesson creation lately, and I thought I should take advantage and throw some of them out here on the blog. Please take, [...]
I was just observing a third grade class learning/reviewing basic fraction to decimal conversion, and I overheard a great remark. A girl, reading a word [...]
I recently posted this interesting inversion problem: The question is this: in mod n, how many functions f(x)= ax +b are their own inverses? For example, the [...]