This is a GeoGebra Screen with all of the Views open. You will not be using them all at once, so don’t panic! The first panel is a Computer Algebra System (CAS); I haven’t used that too much yet. The second panel is the Algebra view. This displays names, values, equations, etc. of everything...
Read more →Last weekend I had the great pleasure of learning about matrix transformations in GeoGebra from the incomparable Todd Edwards! He was one of the organizers, along with Steve Phelps, of the 2013 North American GeoGebra Conference, held on the beautiful Miami University campus, in Oxford, OH. (I’ll write more about that soon.) On our...
Read more →Preparing for teaching volume and surface area of spheres led me to this thought. Can we demonstrate that the volumes of Platonic solids approach that of a sphere? Hmn, I made more nets and spent another weekend cutting, folding, and gluing.
Read more →I have been revisiting these topics as a launch to trigonometry, and I am once again amazed. Two years ago, in London, I stayed in a hotel designed around Fibonacci Numbers and the Golden Ratio. The reception staff did not quite understand the math (though Francesca and Antonio were charming “hosts”), so, upon my...
Read more →Here’s a cool motivator for studying fractals, similar figures, the Pythagorean Theorem, exponential functions, etc…
Read more →I had the privilege of working with five motivated and thoughtful teachers this week who will be teaching our Geometry21 course this year. I had about six hours to show them what this course is all about and make them understand what blended learning looks and feels like. I think it will be a...
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