But - I wish more schools (including post-secondary) were not so focused on percentages and averages, but actually looked at the proficiency and improvement of a student over time through a given unit. See this example article which is awesome!
http://cherraolthof.wordpress.com/2013/04/12/who-will-pack-your-parachute
I know which student I would use to pack my parachute. Before the "older" generation chime in, recognize that there are a lot of researchers and professionals who study assessment practices, what works and what doesn't, and how to properly guage student success before getting emotional about the 'fact' that an average grade is not necessarily the best method of showing what a student knows.