[vitobcn]

I find this graph outlining the frequency of different grades from 1949-2009 to be enlightening [1]. Around 1940's only 15% of grades were "A", and in the last few years they went up to close to 45%.

The source data is coming from research compiled by Rojstaczer and Healy [2].

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[1]: http://pazymino1evolutionliteracy.blogs.umassd.edu/files/201...

[2]: http://rampages.us/profjhonn/wp-content/uploads/sites/111/20...

[chestervonwinch]

Here is a better version:

http://www.gradeinflation.com/figure8.png

and another interesting one in addition:

http://www.gradeinflation.com/figure1.png

[Sacho]

How can you differentiate between grade inflation and knowledge inflation? Perhaps the increase in grades is because the difficulty of the material doesn't rise as fast as our ability to teach it and students' ability to learn?