Cornerstone Educational Group Achieves NWEA-Accurate Growth Tracking
Key Results
±1%
NWEA Accuracy
Maximum deviation from official NWEA calculations
100+
Validation
Test cases verified against NWEA official results
High
Confidence
Trust in data for high-stakes decisions
The Challenge
Cornerstone was using in-house spreadsheets to calculate student growth percentiles, but their numbers never matched NWEA's official reports. This discrepancy undermined confidence in their data for teacher evaluations and accountability reporting.
The Solution
AcumenEd replaced the manual calculation process with automated SCGP computation using the exact NWEA 2020 normative data and formula. Every calculation was validated against NWEA's official methodology.
“The SCGP calculations match NWEA's official numbers within one percentile. We finally have growth data we can trust.”
Robert Martinez
Director of Assessment
Results in Detail
±1%
NWEA Accuracy
Maximum deviation from official NWEA calculations
100+
Validation
Test cases verified against NWEA official results
High
Confidence
Trust in data for high-stakes decisions
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