In general, individual students are able to recognize and acknowledge good teaching regardless of the grades they receive. Inflated grades also inflate course ratings. Good grades may well reflect effective teaching. Ratings for assessing relative performance among different teachers can be reduced to two or three elements. Student outcomes should be demonstrated separately.
Ratings vary with time away from course.
Hence, a course evaluation for summative and comparative purposes may be reduced to the following. The last two questions are to gauge bias in the responses to the first three. Provide an overall rating of the instructor. Give an overall rating of the course. Estimate how much you learned in the course.