This document outlines guiding principles for grading in a physics class:
1. A student's grade should be determined solely by their understanding of physics concepts, not other factors.
2. Homework is for practice and should not affect grades.
3. Students can learn concepts at any time as long as they eventually learn them.
4. Assessments should provide guidance on how to improve understanding.
5. Assessments need to incentivize students to do the work required to improve their understanding.