I share a similar experience and response to talldyo. The problem is "we" (talldyo and I) understood how to solve the problems (as proved by passing the tests) but were uninterested in wasting our time doing busy work. The teacher could have changed their grading to be something like 50% of the grade comes from homework and 50% from tests. Then I likely would have done the homework, while still being pissed because it's just "busy work". I prefer just taking quizzes and tests to determine grades and if I understand the material. How I learn and how much practice I need to get to understanding and being able to solve the problem should be no ones business but my own. If the teacher was prudent they would have just left talldyo alone. The teacher needlessly caused additional problems and pain and suffering.