A recent report from the College Board investigates two key issues: grade inflation, in which teachers over time assign increasingly higher grades for a given level of achievement; and grade nonequivalence across schools, in which teachers in different schools apply different grading standards for the same curricular material. (ascd.org)
The author concludes that such practices as grade inflation and grade nonequivalence make it difficult for college admissions officers to make a valid assessment of a student's achievement in comparison with other applicants. (ascd.org)
There are many other ways where nonequivalence could be demonstrated. (climateaudit.org)