Tuesday, March 18, 2014

Edit a Mathematical Model

Modeling is really important. For example, Common Core Math Practice #4 says, "Model with mathematics." Actually that is what tonight's webinar is about, "Model with Mathematics in the Common Core Algebra Classroom with TI-Nspire Technology."
The only TI-Nspire tool that actually says MODEL is in the Vernier DataQuest app. It is under Analyze.
On the handheld or software you can easily use the DataQuest application even if are not using a Vernier sensor. Click the Table View, or Tab and arrow to it, or press Menu, View, Table.
Put in your x and y data.

You actually don't even need to do this to use the Model tool, but it does make sense to mathematically model data.  This Model tool is the easiest way to set up 'sliders.' You will also get the smallest 'minimized sliders' that you can find on the TI-Nspire. They are referred to as spinners. That's why you'll see the 'spin increment' field. (I think spinners is a common designation for these 'minimized sliders' for people in other parts of the world. Many Americans have asked me why they are called spinners.)
When recently using model, I accidentally pressed enter. The model appeared before I had a chance to set the spinners to what I wanted them. This happened to several participants in a recent presentation workshop too. I heard a quality participant (thanks Diane) request for there to be a way to modify the spinner size AFTER you accidentally press enter.

I'm excited to report that you can change the set up to the model after it has been created. Clicking on the model just expands the model (this is the expected behavior in the left panel on DataQuest), BUT right-click on the word Model allows you to "Modify Model." On the handheld the contextual 'right-click' menu is activated by pressing ctrl menu when you are in the desired location. 

Here is a great video I just came across that explains more about models in science and theology by John Byl.

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