Trellison Institute — Data Services

Education Insights

Data journalism on education assessment, verified against NCES and NAEP sources. Every statistic checked. Every claim traceable.

41 of 41 Statistics Verified Against NCES Sources

This page presents analysis of education assessment data drawn from the National Assessment of Educational Progress (NAEP) and the National Center for Education Statistics (NCES). The work comprises 6 articles examining trends in student achievement, assessment methodology, and the implications of declining test participation.

All 41 statistics cited in these articles have been independently verified against NCES source data. The verification log, source references, and methodology notes are available below.

6
Articles
41
Statistics Verified
100%
Verification Rate
4
NCES Sources
The Articles

Education Assessment Analysis

1

The NAEP Score Decline: What the Data Actually Shows

Analysis of long-term NAEP trends separating pandemic effects from pre-existing trajectories. Examines reading and mathematics scores across grade levels with demographic breakdowns.

NAEP Trends
2

Assessment Participation and Selection Bias

How declining test participation rates affect the representativeness of NAEP results. Statistical analysis of exclusion rates and their impact on reported achievement gaps.

Methodology
3

State-Level Achievement Variation

Cross-state comparison of NAEP performance controlling for demographic and economic factors. Identifies states outperforming and underperforming statistical expectations.

State Analysis
4

The Achievement Gap: Measurement Challenges

Critical examination of how achievement gaps are measured, reported, and potentially misinterpreted. Reviews alternative metrics and their policy implications.

Equity
5

International Benchmarking: PISA, TIMSS, and NAEP

Comparison of U.S. student performance across international assessment frameworks. Examines methodological differences that complicate cross-national comparisons.

International
6

Education Data Infrastructure: What We Measure and What We Miss

Assessment of the national education data collection system. Identifies gaps in longitudinal tracking, workforce outcomes, and early childhood measurement.

Infrastructure

Based on data from the National Center for Education Statistics (NCES) and the National Assessment of Educational Progress (NAEP). Daniel McGrath is a former Associate Commissioner for Assessments at NCES. Trellison Institute does not claim endorsement by Mr. McGrath, NCES, or any referenced organization. All analysis uses publicly available data and published methodologies.

Data Journalism Bureau Model

1

Source Verification

Every statistic traced to NCES/NAEP source tables and verified programmatically

2

Methodology Review

Published assessment methodologies applied, limitations documented transparently

3

Multi-Format Output

Articles, data stories, policy briefs, and replication packages from same verified data

4

Quality Gate

Research integrity gate evaluates methodology transparency and data provenance before publication

Data Sources Checked

NAEP Data Explorer National and state-level assessment results, demographic breakdowns
NCES Digest of Education Statistics Comprehensive education data tables, longitudinal series
NCES Common Core of Data (CCD) School-level enrollment, demographics, and fiscal data
NCES IPEDS Postsecondary education data, completion rates, institutional characteristics