I know an equitable grading champion at an LAUSD school, I'll see if I can get material to share. EDIT: I just received [0][1][2][3].
[0] (5 page pdf) https://drive.google.com/file/d/1YO7SQEwisAbHHi6mfgj7XU9FcSB...
[1] (4m30s video) https://drive.google.com/file/d/10eWor4uhSxR8ZITA1w3kzqhTOX0...
[2] (audio interview) https://www.bamradionetwork.com/track/fair-grades-dropping-g...
[3] (article) https://ascd.org/el/articles/taking-the-stress-out-of-gradin...
The nice thing about an all pass/fail system is you can formalize the 'new' way grades are actually done in which A means meets expectations and anything less means did not. Making pass mean A/B takes a lot stress off students and C/D is already failing for practical purposes as often you can't continue with less than a B.