Precision Teaching

and

Standard Celeration Charting

Taking frequency measurements set precision teaching apart 
from most other educational measurement practices. 

The most common way to measure how well someone does something 
typically occurs with percentage, but one problem with using 
percentage readily appears when you try to distinguish competence. 

Celeration charting provides graphics for acceleration data 
(behavior you want to occur more frequently), and deceleration data 
(behavior you want to occur less frequently).