In the exercise it says to use the argument students, which you should expect to be a list containing 3 students. As to why putting non-sense as the argument I'm not sure. TBH I may be in over my head there. I assume the argument would work as students so that my for loop would loop through the list of students and calculate the "class average". If you're hinting at what I think you are: you're saying Ive messed up that line of logic somewhere and no matter what argument I put it would spill the same thing out.
As far the global variable change. I changed it because it seemed to coincide with my for loop
for students in students
as stupid as that sounds. And it very well may be. I'm pretty new to this and trying to abstract think this is difficult right now.