Comment by girvo

> homework can bring your grade up but was not required for a perfect grade

A biochemistry unit at a Uni in Australia I took in ~2010 operated this way, which was quite surprising to me. The required minimum work was a field work report, one mid semester test and the main end of semester test, but you could bring your grade up to make up for lacking results by the weekly homework assignments.

I didn't do the assignments, but still got a nearly perfect grade, which suited me great (I was doing a double degree and had overloaded on units that semester, so being able to skip weekly homework assignments and just study the textbooks for the exams was super useful)