That seems entirely likely. My favorite math professor comes to mind. I think he weighted the difficulty levels of homework and tests correctly. Basically the homework prepared you for more than the tests and the homework was explained well in class. So you’d for sure have questions on the test that you knew how to do if you kept up with the homework. That may sound like a lot of classes, but he achieved a balance between homework and tests that made it more likely to score well on the test than usual.