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Assessment
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Slope Calculation Directions

To calculate the slope of a student’s CBM scores, the teacher should follow the steps outlined below:

Step 1

Black Black Onyx Onyx Onyx Onyx Boots Women's Black Boots Boots Women's Women's Collect the following:

  • The score on the first probe (y1)
  • The score on the last probe (y2)
  • The first administration time period (x1)
  • The last administration time period (x2)

Example:

  • y1 = 1
  • y2 = 14
  • x1 = 1
  • x2 = 8
Step 2

Apply the following formula:

Slope = y2-y1

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Example:

Slope = 14-1

8-1		 = 13

7		 = 1.8
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