Not at all.
If the course required turning in a notebook, I pretty much had a guaranteed 'A' on all the tests.
For the rest of my courses, it could be hit or miss. The stuff that sticks, sticks for a long time. I always nailed the end of semester final exams. I never put in any effort into memorizing the last few things that would get me a good test score, resulting in some mighty inconsistent performances. I remember my biology class - it was the first class that I managed to hit every passing grade in the same semester. An A on the final, but hit B, C, and D for the 6 week grading periods (I don't remember what order I got the grades in, though).
Shoot, I ran cross country and held down a job. When was I going to find time to study?