All posts by Mr Hartzer

Graphing calculators for your smartphone

Here are three options for free graphing calculators on your tablet or smart phone. If none of these are to your liking, just search the store for “graphing calculators”. The information below is based on the Android versions running on my tablet.

  1. Desmos (available for iOS and Android, as well as in browsers)
    • Basic functions are available on the main screen.
    • To get the third root, press “functions” -> “misc” and pick the nth root button. Then use 3 for n.
  2. GeoGebra (available for iOS and Android, as well as in browsers)
    • Basic functions are available on the main screen.
    • To get the third root, press “f(x)” and pick the nth root button. Then use 3 for the first blank.
  3. Wabbitemu (available for Android, as well as computer installation)
    • This allows you to load a calculator that works just like our class calculators! I would recommend this for tablets, but it’s probably too small for a phone.
    • Once you’ve installed and run the app, select “Help me create a ROM using open source software” and click “Next”.
    • Select “TI-84 Plus C SE” and click “Next”.
    • You can now touch buttons just like the class calculators.

 

Vi Hart on Logarithms

In this video, Vi Hart talks about the multiplication scale, which gives us logarithms. She speaks quickly and poetically; don’t expect to understand all of it at this point. If you just want to hear the part about logarithms (which applies to the slide rule that I was discussing today), jump to the 5:00 mark.

End of First Quarter

The first quarter officially ended November 8. I will accept work towards the first quarter marking period until I leave the building on Friday, November 10. The last official grade of the first quarter are the reteaching sheets I handed out on Monday; the Kuta worksheets assigned on Wednesday will count toward the second quarter.