Slope Calculator
To calculate the slope of a student’s CBM scores, enter the following, then click the “Calculate” button.
The score on the first probe
The score on the last probe
The first administration time period (e.g., 1 for week 1)
The last administration time period (e.g., 10 for week 10)
Reset
Calculate
Slope Calculation – Directions
To calculate the slope of a student’s CBM scores, the teacher should follow the steps outlined below:
Step 1 
Collect the following:

Example:


Step 2 
Apply the following formula:

Example:

(Close these directions)