Tag Archives: Real data

Victory is Ours!

We made the decision this year to start our precalculus classes (both honors and non-honors) in the study of trigonometry. This decision was made based on frustration with the traditional slow start of reviewing Algebra topics and based on the request of our physics teacher. So now kids can start off a little more productively if they are simultaneously enrolled in some level of physics and some level of precalculus. So, today I decided to try out an experiment with Desmos. I made a table of values of the average daily temperatures of my beloved former home (Gainesville, FL) and I both gave the students a physical table of values and displayed the plot of this table of values on on the board through Desmos.  Their job, in their pods of 2, 3, or 4 students at a time was to match a function to this data. I was SO happy with the work they did and with the conclusions that they arrived at. Here is a link with the data and the various equations

https://www.desmos.com/calculator/nvinc8pwdh

Note that above I said (separately) that I was satisfied with their work AND their conclusions. I am trying so hard to make that distinction for my students. To talk about the process, the thinking that goes on. One group pulled out an iPad and called up their own Desmos app and kept tweaking their work. We had great conversations about how to identify the amplitude, how to deal with phase shifts, what should the period be, etc. I’m not crazy enough to think every day will go so well, but I sure am happy and optimistic right now.

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