Those charts you show are fascinating! I don't doubt the grade inflation in private schools. I wouldn't have expected it in public schools as well. I got my bachelors degree from a private school and what a waste of money it was. Academics were terrible and the only motivation of the school was to get as much money from me as possible. Even getting transcripts have an excessive profit motive. But I also saw problems in my public school I went to for my associates degree. Some of the professors had been there so long and were just collecting a paycheck.