Carnegie rule
Encyclopedia
The Carnegie rule is a rule of thumb
Rule of thumb
A rule of thumb is a principle with broad application that is not intended to be strictly accurate or reliable for every situation. It is an easily learned and easily applied procedure for approximately calculating or recalling some value, or for making some determination...

suggesting how much outside-of-classroom study
time is required to succeed in a typical college course. Typically the Carnegie Rule is reported as
two to three hours of outside work are required for each hour spent in the classroom.
The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
x
OK