This is a TI-CBR2, sometimes called a sonic ranger. No, not that kind… A sonic ranger measures the distance to a moving object by bouncing ultrasonic sound off the object and timing the echoes. The data, taken about every 0.05 sec., is read into a computer, which then plots the distance, velocity, and acceleration....
Read more →One applet… Three equations… It’s Quadratic-Palooza!
Read more →About a year ago, I started a Twitter account. I tweeted a few comments and photos about the Connecticut Student Film Festival, which I was supposed to attend, but then got sick. I looked in on Twitter once in a while after that, but it didn’t seem to have much appeal for me. So, I...
Read more →I love making animated shorts with GeoGebra and iMovie. These films show geometric relationships in interesting ways! This one is a fun project for students who may not have the technical or artistic ability to create an original image.
Read more →Sadly, there are folks out there in the math and math education world who really don’t get what programs like GeoGebra and Desmos can do to open up mathematics to people who might not otherwise approach it. I happily commented on a forum thread recently, in which a member posed a geometry question. I...
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