Lower level classes are generally rated lower. Elective courses are rated higher, required lower. Students with lower grades give lower course ratings. Inflated grades also inflate course ratings. Ratings for assessing relative performance among different teachers can be reduced to two or three elements.
Ratings vary with time away from course.
Classes with higher workloads and more rigorous standards get lower ratings. Lower level classes are generally rated lower. But see also note on required courses. Elective courses are rated higher, required lower. Students with lower grades give lower course ratings.