O'Connor discusses principles for grading that promote learning over punishment. He outlines 15 fixes to broken grading practices, such as not including behaviors in grades and only grading based on achievement standards. Formative assessments should provide feedback rather than grades. Zeros should be replaced since they disproportionately impact grades. Involving students in assessment helps ownership over learning. The goal of grading should be to support mastery of learning standards through developmental, feedback-focused practices.