This week, my math class studied scatter plots and best fit lines. This definitely is not the most exciting concept to teach, so I looked for other ways for students to become more engaged. Lucky me, I found several activities that were a big hit!
The first concept that students needed to learn was how to create a scatter plot. As eighth graders, students were familiar with creating a scatter plot from given information. However, I wanted to challenge them to look at the association of the graph. Is it linear or nonlinear? Positive, negative or no association?
Once the class felt pretty confident in identifying these types of associations, I gave them an activity that really peaked their interests: favorite foods! This activity is a word document created by Erica Chauvet from Trinity High School.
First, students individually rank their favorite foods from 1 to 10. Next, students pair up and create coordinates based on what their favorite foods are in order to compare them. They plot their coordinates and look at the graph to see what type of association they have! Strongly linear graphs would demonstrate more similar tastes in food!
Best Fit Lines
The next step meant teaching students about the best fit lines. I knew this concept would challenge a few of my students, so I wanted to show them the concept of WHY this was important. I believe this game was one of my best finds yet! XP Math has several games for students in all grade levels, and Naruto: Line of Best Fit had students learning math without even knowing it! In fact, I had several kids go home and play that night on their own!
The idea of the game is to help Naruto capture as many scrolls as possible by moving the line. Students are then introduced to the concept of creating a line that will be in the middle of the most points possible-the same idea of a best fit line! When I introduced best fit lines the next class period, I actually continually referred to making their lines “like Naruto” and capturing as many “scroll” points as possible!
Taking It Further
I wanted to stretch some students even further in their thinking of these concepts, and I found one more activity that would help with this on Desmos.com. If you have never used this website for math activities, try it now! Teachers can give students a login code and once each individual logs in, the teacher can monitor the progress on their own screen! When I have students do an activity here, I know exactly which question each student is on AND can see their answers. There are options to “freeze” all students’ screens when you need to explain something or “pace” students so they can not go through the questions too quickly!
Anyway, there was an activity that related to best fit lines on Desmos as well. The activity got students thinking about residuals as well, which was above our 8th grade standards, but a great introduction to future math concepts!
If you teach a middle school math class, I encourage you to check out some of theses resources! Even if you do not need to teach scatter plots, these have great options for other math concepts as well!