My Perceived Scale of Exertion

* this is a scale from 0-10 I use to describe how hard a ride should feel they are working during class.  

Please do not confuse this Perceived Effort Scale with tension, use RPMs/Watts (effort) if available/and a description of terrain.   

This is not a linear graph

0-6 gradually builds in difficulty but once you break out of the endurance zone the perceived effort/difficulty increases rapidly.