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Modern Grading: How to Use Linear and Square Root Scaling
A guide for educators on how to fairly adjust test scores using mathematical scaling models.
Fair Scaling: Linear vs. Square Root Curves
Sometimes a test is harder than intended. As an educator, how do you adjust grades without losing the integrity of the assessment?
The Square Root Curve (10√x)
This popular method helps students on the lower end more than those at the top.
- A raw score of 64 becomes an 80 (√64 = 8, 8*10 = 80).
- A raw score of 81 becomes a 90.
How-To: Scale Your Class in Bulk
- Paste your list of raw scores.
- Select your target system (US, French, or German).
- Export the final results to Excel for your gradebook.