Showing posts with label online calculator. Show all posts
Showing posts with label online calculator. Show all posts

Thursday, June 5, 2014

10 Reasons Why I think the TI-84 is on the way OUT!


Yesterday a colleague told me she overheard some students talking about how they never used their TI-84 at home.  She pursued the discussion and they said that they use DESMOS the online calculator all the time at home.   I think the use of it will go away slowly.  But it will happen.

The TI-84 (or TI-83) has been a fixture in my classes for many many years.  It has been a requirement on my syllabus.  It is something that I would daily ask my students to take out and work with.  I can't count the number of tutorials I've made to help use the TI-84.  It has been a go-to device for CONCEPTUAL learning.  But things are changing.

My Prediction.  Our school will not be requiring the TI-84 in the school year 2015-2016.  I have no authority to make that call.  I'm just making a prediction.  Our school goes 1 to 1 that year.  In my opinion, the days of every student having a TI-84 are going away.  Why?  Because other things are passing it up. And the thing that is passing it up is NOT another Graphing Calculator.  It is the Internet with web based interactions and  apps.

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10 Reasons why I think the  TI-84 will NOT be required at our school in 15-16 
1.  Touch Screen
Students are getting frustrated with the TI-84 because it doesn't offer a touch screen.  The touch screen on a SMART-Phone or a tablet helps with finding the right window, editing data, sliders, and a bunch of other cool things. Also, the mouse is even better than the awkward navigation system of the TI-84.   I have tried to physically touch the TI-84 screen many times.  That's embarrassing.

2.   Ease of Use
As technology gets easier and easier to use.  The TI-84 seems to be more and more confusing to use.

3.  Size of Screen
A computer screen is a lot bigger than a TI-84 screen.  And a SMART-Phone screen is equivalent to a TI-84 screen.

4.  THE COST!
Why should we ask our students to pay $100 if our students will have constant access to a district owned device?  (i.e. tablet, Surface or Chrome book)  EVERYTHING that a TI-84 can do, a district owned device can do.

5.  1 to 1
Our district will likely go 1 to 1 in the 2015-16 school year. Every student will have a district owned device like a tablet at that time.  It doesn't make sense to have both devices.

6.  Data Exchange
The TI-84 system of exchanging data is old and outdated.  Basically it is useless.  For me to get something onto my student's calculator is nightmarish.  (It used to be really cool)  But, because the transfer of data is so easy with phones, and computers, and  tablets, that the technology of the TI-84 is really getting in the way of collaboration.  Remember, it used to be so cool to give your students a program or some data via the cord that goes between the calculators.  There is way too much teaching time wasted on account of this.  The students know a lot of ways to get information to each other that does not require a cord.

7.  Finding the Right Window
I have forever said that finding the right window is a great math skill on the TI-84.  However, I think I have been bypassed with the love of this skill.  The ease of a computer or tablet to get the right screen is far superior to the TI-84.

8.  Animations/Sliders
Sliders offer a hands on approach to math.  It encourages participation with the activity, with low risk high reward outcomes.

9.  Apps and Programs
The Internet math based apps are gaining momentum.  It's getting easier and easier to use math notation on the Internet.

10. Internet Based Math 
Desmos, Geogebra, LaTeX, online calculators etc.  This is just the beginning.  

Standardized Tests are the problem. I don't know what will happen with these.  The TI-84 has been a fixture for an acceptable device on the standardized tests for a long time.  With the PARCC online testing, this might be changing too.

TI-84 may you Rest In Peace.  It is time to move on.

Tuesday, February 25, 2014

The Desmos Obstacle Challenge

Here is the challenge:  To move from the START POINT to the END POINT using equations.  You will have to navigate a little bit through some obstacles.  You can have your students use any equation or certain equations.  For instance, you could have them use all parabolas or all lines.  I have put together a few challenges.  They are below.  You can go to any of them simply by clicking on the image.  If you want to make your own, then just go to www.desmos.com and click on the "+" sign (add item) and add a picture of your own.

Click on any graph to go to the DESMOS graph and take the Challenge.  




Desmos has a FACE drawing website that all math teachers need to check out calling it DESMAN.


Friday, February 21, 2014

Making a Face with DESMOS.com

If you haven't worked with desmos yet, you are missing out.  It is so easy and intuitive.  The students will catch on so easily.  Here is the in class assignment I gave today.  This was a precalculus class.  You can easily adjust this for any high school math class.

This was a student's work was done in 15 minutes of class time.  There is so much math here too.  
  

Sign up with desmos.com and make a face using the free online calculator.

Your face must include these things:
1.  A circle or ellipse
2.  A line
3.  A sin or cos wave
4.  A slider
5.  A parabola
Now post your face in a link to this website:  http://tinyurl.com/nchsprecalculus6

Please go to this site to see all the wonderful examples that my students made.  They will make you smile.

Here are some questions that I had today.
How do you make the sin wave go vertical instead of sideways?
How do you move the circle from the center?
How do you restrict the x values so they don't always show?
How do you make a circle bigger?
How do I make this parabola wider?

Take 15 minutes and make a face today and you will see how much math DESMOS has.  Now this was a fun class.  The students were really active in their pursuit of the math topics. Please try this and let me know how it goes.
Dave




Wednesday, November 2, 2011

Awesome Color Graphing Calculator ONLINE

Now I really like this one.  I like it because it is very easy to use.  It can graph my lines in color.  It can graph an inequality.  It is absolutely free.  Just go to the site below and use away.  It doesn't have all the bells and whistles that a TI-84 would have.  I think I like it for displaying multiple graphs at once.  This makes it so much easier to see the different graphs.  You can say "Where the green function and the red fucntion intersect".  Let me know what you think.
Best,
Dave
http://my.hrw.com/math06_07/nsmedia/tools/Graph_Calculator/graphCalc.swf