It’s my understanding that prior to the 1994 grading changes, you could drop the course up until the day to of the final and could repeat the course an unlimited number of times. I am not aware of a limitation of only repeating if C- or lower. Some newspaper stories claimed it was common for students to purposely fail courses since failing grades did not appear on the transcript, but I doubt that this is accurate. However, I do think many students who believed a non-A grade was on the horizon dropped the class after having completed the majority of class hours and work. This fits with students expressing concern about the proposed changes to drop deadline, rather than proposed changes of restoring failing grade.
In 1994 this generous grading system was modified to something similar to the current system, which is quoted below. Note that it mentions the student may retake “any course on his or her transcript, regardless of the grade earned.” The transcript indicates that the course was repeated, but does not list the original grade. One of the 1994 changes was limiting to a max of 1 repeat unless the student receives a NC/NP. They also restored the NC/NP grade and changed the drop course deadline to within the first 8 weeks.
A student may retake any course on his or her transcript, regardless of grade earned, and have the original grade, for completed courses only, replaced by the notation ‘RP” (repeated course). When retaking a course, the student should enroll in it for the same number of units originally taken. When the grade for the second enrollment in the course has been reported, the units and grade points for the second course count in the cumulative grade point average in place of the grade and units for the first enrollment in the course. Because the notation ‘RP’ can only replace grades for completed courses, the notation 'W’ and ‘I’ are not replaced by the notation ‘RP.’
A student may not retake the same course for a third time unless s/he received a ‘NC’ (no credit) or ‘NP’ (not passed) when it was taken and completed the second time. When a student completes a course for the third time, grades and units for both the second and third completions count in the cumulative grade point average. The notation ‘W’ is not counted toward the three-retake maximum.
These policies reflect changes adopted by the faculty Senate on June 2, 1994.
There was a long report about grade distribution during as part of the grading changes in 1994. It mentions that in 1992-93 Stanford had the following grade distribution:
In 1992-93, the mostly commonly assigned grade was A. The median letter grade in undergraduate courses was A-; it was A at the graduate level. The C was given out only 9 percent of the time to undergraduates and 3 percent to graduate students.
At the undergraduate level, the natural sciences and earth sciences assign the smallest proportion of A’s and the largest proportion of C’s. On the other hand, more than 55 percent of letter grades assigned by the humanities and language/literature departments are A’s. They assign about half as many C’s as do other H&S divisions,
I attended Stanford after the grading changes were in place that are described above. My experience was the vast majority of students did not repeat courses, but there was a minority who did. Earlier in the thread, I mentioned one woman I knew who repeated courses in which she received an A- grade. She attended Harvard Medical School on a special award after Stanford.
With the repeat courses option and the most commonly assigned grade being A, one might think this means Stanford classes were all easy A’s with little work. My experience was quite different. It was common for undergraduate math/science/pre-med foundation classes with students from a variety of majors to have a median grade of B/B+, particularly ones that are not at a more accelerated or more rigorous level than the default track. Many students found classes challenging and found achieving higher grades in those classes to be challenging, which sometimes led to switching out of quantitative majors. For example, following the first midterms of freshman year, they had psychological counselors sent to our dorms as a preventative measures because a significant portion of students were struggling with getting the lowest grades of their lives, such as first ever B’s.
As I noted earlier, I don’t think achieving A grades at Stanford was consistently easier or harder than other colleges where I have taken classes, including publics. However, it was common for Stanford classes to require more work per week than other colleges, such as more pages of reading. There were also often opportunities to take higher levels of classes for students that were looking for higher levels of rigor or more advanced treatment of subjects. For example advanced freshman physics at Stanford was at a far more rigorous level than the physics courses I took at RPI. I found this physics class to be one of the most challenging courses I have taken, even though the median grade in the class was at least A-.