http://chronicle.com/article/Texas-A-Ms-Bottom-Line/124451/?sid=pm&utm_source=pm&utm_medium=en
Texas A&M's Bottom-Line Ratings of Professors Find That Most Are Cost-
Effective
The teaching revenue is calculated by adding tuition paid by students—
larger classes generate more tuition dollars—and factors in the weighted
value for semester credit hours of different types and levels of courses.
Those weighted values are used to determine state financial support (for
instance, hours spent teaching gr