I actually think he did a pretty good job at the test.
I mean, he probably doesn't spend a lot of time discussing wax like we do so he doesn't know every variable.
This project was probably more for him to see the scientific method, how to write a lab report, take up class time, etc.
I actually knocked the link back a couple / till I got to the class webpage and sent his teacher a link to this thread and said the project looked good.