"Each Math Fun Fact is a mat puzzle or short article that contains a cool mathematics idea. You'll can <sic> learn about the mathematics of things like card shuffling to poker to computer vision to fractals to music, just to name a few."
However, it could be very appropriate for upper-level high school math classes as well! A great use might be to show these as a "Fun Math Fact of the Day," etc., to help expose kids to college-bound math skills. In fact, there's a link to a random Fun Fact in the upper left-hand corner of the page! You can also search within subjects like Algebra, Calculus, Geometry, Probability, Topology, or Combinatorics. (I'm not sure what some of those are, but they sure sound "Math-y," don't they?)
Thanks to www.FreeTech4Teachers.com for this link!