Desmos heats up the SAMR model

Posted: April 14, 2014 in Uncategorized

eDESKlogoSquareguestblogger

How I used Desmos to move up the levels of SAMR:

The ANCIENT method is to use graph paper to get a visual representation of a function.  I used to use this method to teach the skill of graphing lines in Algebra 1.  I typically do not spend too much time in my Algebra 2 class using the paper and pencil method because the goal is to understand how the transformation form (vertex form) changes the parent function.  Using paper and pencil is so time consuming and I really struggle to wait for students to use it (especially when they all love to use rulers)

Graph paper

 

Substitution is to use a TI graphing calculator to speed up the process of graphing functions instead of using a paper graph.  I can remember being a senior in high school and having my pre-calculus teacher required us to purchase a graphing calculator.  I think it was the TI-82 and the students knew more than the teachers.  It was the first time we got our hands on technology in the classroom and it actually changed how I viewed my math classes.  We require Algebra 2 students to have one but with the implementation of chromebooks TI might become obsolete in our classrooms with the accessibility of free online competitors.

TI calculator

Augmentation is to use Desmos to increase the ability to graph multiple functions at the same time (addition of color as well).  Desmos blows the TI out of the water when it comes to so many functions.  Multiple graphs, accessibility, easier saving, printing, sliders, function forms (doesn’t have to be y=),  etc.  TI has a better battery life than my laptop but that is about all I could come up with.

desmos quadratic

Modification is to create a “picture” using multiple functions with domain/range restrictions.  My students loved this project.  We had great conversations about domain and range restrictions and limitations of functions.  I know how uncreative the paper and pencil project would have ended up.  My students weren’t afraid to try different functions and could quickly restrict the parameters without fear of “wasting time’ or paper.  It also opened my eyes to the power of Desmos and I have never turned back.

Desmos cat

Redefinition is to have a student create graph(s) and have another student try to recreate by writing the functions or using Desmos to graph the exact same picture.  Also, Daily Desmos does this on a daily basis from easy to complicated so it would apply to every level of student.

Daily desmos beginnerDaily desmos advanced

 

 

 

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s