To introduce scatter plots and lines of best fit I host the “Texting Olympics”! I adapted the lesson from New Zealand Maths to include a graphing calculator component. The students time each other texting both phrases and all the data is compiled into one list. Since this is the first scatter plot activity we do, I have them graph the data by hand, and then by calculator. I do not walk them through the calculator portion, but ask them to follow the directions in the packet and check off items as they are completed.
Every time I have completed the lesson, the students have a ball, and there has always been a positive relationship between the two texting events. It’s also fun to assign “Bring your cell phone to class tomorrow” as homework the night before to build anticipation.