What is the purpose of the “timing”, measuring what the child has/can master within a certain timeframe?
The purpose of timing during CBM is to determine the child’s fluency with literacy-related skills. If a child is able to read 100 words of 150 words correctly, but takes five minutes to do so, then the child is reading at a rate that indicates some degree of reading difficulty. Additionally, one criterion to be met by any CBM measure is that it must be efficient. One way to maximize efficiency is to minimize the amount of time a teacher must take to implement the assessment.