Professor took our names down and we all got an additional 20 percent added to our final grade. Not 20 points, I mean 20%. So if you ended up with a 70 (a C), he bumped you up to a 90 after the final for an A.
Biggest reverse curve: back in the 80s, had Chem 1202 with Watkins. First day of class he told us the grading scale was that 10% are A, 20% B, 40% C, 20% D and 10% F. First test average was 26, second test average was 35. After the drop date someone asked him to repeat the grading scale so we would know where the cuttoffs for each grade was. His response was 90-100 is A, 80-89 is B, etc. 100 people walked out.
An additional 20% of 70 is 14, so you would have ended up with an 84 in this case.
Adding 20 points to a grade of 70 would make it a 90.