In the landscape of American public education, a quiet but profound transformation is underway in the nation’s capital. Washington, D.C., has emerged as the fastest-improving school system in the United States, according to a sweeping new analysis by researchers from Stanford, Harvard, and Dartmouth. Yet, even as D.C. celebrates this newfound momentum, the city remains at the heart of a volatile debate: Is a school system truly successful if it is moving in the right direction, but failing to get the majority of its students across the finish line?
The Education Scorecard, a landmark study covering over 5,000 school districts across 38 states, paints a picture of a nation largely stuck in a "reading recession." This decade-long slide in student achievement, which began well before the pandemic, shows few signs of abating in most regions. However, amidst this widespread stagnation, Washington, D.C. stands out as a clear outlier, leading the country in both reading and math improvement between 2022 and 2025.
The Tale of Two Metrics: Growth vs. Proficiency
To understand the D.C. phenomenon, one must first distinguish between the two primary ways educators measure success: growth and proficiency.
Growth measures the rate of learning progress a student makes over a specific timeframe, regardless of where they started. Proficiency, by contrast, is a static benchmark—a "pass/fail" threshold indicating whether a student is performing at their assigned grade level.
According to the Education Scorecard data, Washington students—spanning both public and charter institutions—gained roughly two-thirds of a grade level in math and one-third of a grade level in reading over the three-year study period. To put this in perspective, an eighth-grader in 2025 was approximately six months ahead in math compared to their predecessor in 2022.
However, the celebratory tone of these findings is immediately dampened by the cold reality of proficiency data. A separate report from the D.C. Policy Center reveals that in 2025, only 26 percent of Washington students met grade-level standards in math, and only 38 percent were proficient in reading. Perhaps most concerning is that a mere 16 percent of high school juniors and seniors were deemed "college or career ready."
A Chronology of the Capital’s Education Reform
The current debate is the result of years of incremental policy shifts and pedagogical adjustments within the District.
- Pre-2022: The nation faced a long-term, systemic decline in standardized test scores, exacerbated by the global pandemic. During this period, the focus was largely on emergency recovery and mitigating learning loss.
- 2022-2025: D.C. implemented a series of instructional reforms that prioritized accelerated learning. During this window, the Education Scorecard researchers noted a measurable, consistent uptick in student performance that surpassed peer districts across the country.
- March 2026: Deputy Mayor for Education Paul Kihn officially championed the city’s progress. Citing a 3.6 percent improvement in aggregate reading and math scores, Kihn declared in a blog post that D.C.’s academic achievement in terms of growth is "unsurpassed in the country."
- Present Day: The release of the Education Scorecard has ignited a public discourse on whether D.C.’s model—which emphasizes high-velocity growth—should be the standard by which all American districts are judged.
The Statistical Divide: Data at a Glance
The disparity between growth and proficiency is not merely a D.C. issue; it is a national one. Researchers identified 108 "districts on the rise"—areas where students are outperforming peers in similar districts. Notably, while these districts show strong growth, the vast majority still struggle to bring a majority of their students to grade-level proficiency.
This pattern reveals a critical structural issue: many students in high-poverty districts are starting so far behind that even a year of rapid growth is insufficient to reach the proficiency threshold.

- The Affluence Gap: Critics argue that measuring schools solely by proficiency unfairly favors affluent, suburban districts. In these areas, students often arrive with significant external support—tutors, books, and stable home environments—giving them a head start that schools in under-resourced neighborhoods lack.
- The Growth Alternative: Supporters of growth-based metrics, such as Stanford sociologist Sean Reardon, argue that growth is a more accurate indicator of a school’s effectiveness. A school that takes a student who is three years behind and moves them forward by 1.5 years is, by this logic, more effective than a school that maintains a student at grade level but provides no additional value.
Official Perspectives and the "Lost Decade"
The debate has drawn in prominent voices from across the educational policy spectrum. Steven Wilson, a former Massachusetts policymaker and author of The Lost Decade, remains a vocal skeptic of the "growth-first" narrative.
"Gains of any magnitude are a good thing," Wilson stated, "but when most students—roughly two-thirds to three-quarters in the case of D.C.—are not functioning at grade level, this is nothing to applaud. Most students are still being failed by the system."
Wilson argues that focusing on incremental progress risks complacency. He suggests that the focus should shift toward the few school networks that have managed to achieve high proficiency among low-income students, rather than celebrating a systemic rise that still leaves the majority behind. "Let’s take the klieg light and move it to the school systems that are educating nearly all of their students," he urged.
Conversely, Tom Kane, a Harvard economist and co-author of the Education Scorecard, argues that the focus on growth is essential for public morale. "We’re trying to highlight that something good is happening in some of these places," Kane said. "And hopefully, if we can, rebuild the public sense of agency with respect to public education."
Kane acknowledged the importance of proficiency and noted that his team is developing new data points for future reports that will compare proficiency rates among districts with similar demographic profiles, aiming to provide a more nuanced view of success.
Implications for Future Policy
The situation in Washington, D.C. acts as a crucible for the future of American education policy. The implications are clear:
- Redefining Success: Policymakers must decide whether to reward schools for the velocity of change or the attainment of standards. Relying solely on one creates a distorted reality.
- The "Catch-Up" Problem: If a district improves by one or two percentage points annually, it could take a generation to reach widespread proficiency. For the students currently in those classrooms, this pace is insufficient. Education leaders face the immense pressure of needing to accelerate growth exponentially to avoid losing another generation of learners.
- Equitable Comparisons: Future metrics must find a way to account for socioeconomic factors without lowering expectations. The goal is to identify schools that are "beating the odds" while remaining honest about the distance that remains between current achievement and true student mastery.
Ultimately, the D.C. case illustrates a profound contradiction: a school system can be statistically "the best in the country" in terms of progress while still leaving the majority of its children fundamentally unprepared for the future. As researchers, parents, and policymakers continue to parse the Education Scorecard data, the challenge will be to reconcile these two realities—to celebrate the progress being made without losing sight of the millions of students for whom that progress is not yet enough.
The path forward requires a dual-track approach: acknowledging the success of systems that are finally moving the needle, while maintaining the moral and political urgency to ensure that every student, regardless of their starting point, attains the proficiency necessary to succeed in a complex world.












