Okay. This lesson was a struggle for me. I was fine with problems 1 - 4, even though I had to figure out where the luminosity sensor data was located. Once I got to Part C, my computer (or user-error) did not show any information that made sense when I added the IR sensor to the other y-axis. I struggled along, sure I just was not getting it, reopened and repeated the steps, and finally the green dots representing IR sensor data showed up. But even figuring out which IR data to use confused me.
Perhaps this would all be much more obvious to a science person, but it was truly a challenge for me.
I can see sharing this with my science people, who would probably LOVE the CODAP site. Even though this was uncomfortable for me, I want to explore this site to see what else is on here that I might be able to use.
Perhaps additional video tutorials would make this lesson (and others) easier to understand… especially for the teacher.