Grades tend to reduce students’ preference for challenging tasks. 3. Grades tend to reduce the quality of students’ thinking. 4. Grades aren’t valid, reliable, or objective. 5. Grades distort the curriculum. 6. Grades waste a lot of time that could be spent on learning. 7. Grades encourage cheating. 8. Grades spoil teachers’ relationships with students. 9. Grades spoil students’ relationships with each other.
