Wednesday, April 5, 2017

Histograms on Desmos

There is this one lesson in Algebra I where students are required to take a histogram and convert it to a list of number.  Then take that list of numbers and determine the mean, median, mode, range, Q1, Q3, Min, Max, and interquartile range.  The problem was that I couldn't find nice looking histograms anywhere online.  So, I made my own on desmos:

To change the bars all I have to do is click and drag the points where ever I want.  For today's lesson I called students to the computer to create a histogram for us, then we found the information.  Want to use the desmos graph?  Here's a link.  

Thursday, March 9, 2017

The Line Game 2.0

I love playing The Line Game with my students, but there is one problem: not all students can easily see the graphs that are projected.  Then after face-palming myself, I created a Desmos activity.  Why did it take me so long to figure this out?

Click here to read the post about the game.

Now, instead of the students squinting to see the graph on my TV, they can see the graph on their computer screens.

Here is a link to the activity.

You will want to click the option with "Teacher Pacing" to make sure they are looking at the correct graph and not cheating by looking ahead.

Wednesday, March 1, 2017

Teaching With Desmos Activities

I've never really considered writing a blog post about because I figured people would just go to their site to learn.  But it might be beneficial to see how other teachers are using it.

Yesterday I gave my Algebra 1 students a test on graphing with slope-intercept.  The averages of the classes were 75% for the one class and 65% for the other class.  Clearly, they weren't ready for the test.  I decided that this topic is too important to ignore so we are re-learning and re-assessing on the topic.

This is a link to the desmos activity.  

**Note**  Be prepared for inappropriate drawings on the activity.  Period 3 thought it would be funny to draw a penis for all to see. ((sigh))