After millions of American schoolchildren fell behind during the COVID-19 pandemic, some states and school districts are looking at year-round school calendars as a way to recoup lost learning. Typically, year-round calendars don't increase learning time but rather spread school days more equally across 12 months, with a shorter summer vacation…

In a 1984 essay, Benjamin Bloom, an educational psychologist at the University of Chicago, asserted that tutoring offered "the best learning conditions we can devise" and that tutors could raise student achievement by two full standard deviations--or, in statistical parlance, two "sigmas." The influence of Bloom's two-sigma…

Bridge International Academies, the largest network of elementary schools in the developing world operates both low-cost private schools, and public-private partnership schools. More than 800,000 students are enrolled in 2,026 schools in five countries. Bridge tries lots of different ideas and initiatives, many of which are backed up by research…

Special education law has mandated that students with disabilities be served in the "least restrictive environment" possible. This often takes the form of an inclusive classroom, or a general education classroom where students with disabilities learn alongside their non-disabled peers. In some cases, inclusive classrooms are co-taught by…

Has the achievement of U.S. students improved over the past half century? Have gaps between racial, ethnic, and socioeconomic groups widened or narrowed? These and similar questions provoke near-constant conversation. But answers are uncertain, partly because research to date has yielded inconsistent findings. In this article, the authors bring…

Today, Indianapolis has 21 innovation schools serving one in four of its public-school students. Two new rigorous studies point to promising student-achievement gains. These autonomous district schools stand against a backdrop of a thriving public charter sector and a private-school voucher program that fill the gaps. What made this all possible?…

Traditional efforts to increase teacher quality through professional development (PD) have been largely ineffective. A growing body of research on teacher coaching provides strong evidence of its effectiveness as a PD tool, although it also raises difficult questions about whether and how to implement coaching programs at scale. Key considerations…

The Every Student Succeeds Act (ESSA), passed into law in 2015, explicitly prohibits the federal government from creating incentives to set national standards. The law represents a major departure from recent federal initiatives, such as Race to the Top, which beginning in 2009 encouraged the adoption of uniform content standards and expectations…

As public education secretary of New Mexico, Hanna Skandera dug in fast, set an ambitious agenda, and broke a lot of china. Her ability to inspire and subsequently ignore controversy is clear: from the outset, she was deemed so contentious that the state senate refused to confirm her for four years, during which she performed her duties as…

The number of charter schools grew rapidly for a quarter-century after the first charter opened its doors in 1992. But since 2016, the rate of increase has slowed. Is the pause related to a decline in charter effectiveness? To find out, the authors tracked changes in student performance at charter and district schools on the National Assessment of…

In the past few years, four states have established programs that provide public financial support to students who choose to attend a private school. These programs--a tax-credit-funded scholarship initiative in Florida and voucher programs in Indiana, Louisiana, and Ohio--offer a glimpse of what expansive statewide choice might look like. What…

Some of the most dramatic gains in urban education have come from school districts using what is known as a "portfolio strategy." Under this approach, districts negotiate performance agreements with public schools--traditional, charter, and hybrid models. The arrangement affords school leaders substantial autonomy to handcraft their…

When congress passed the No Child Left Behind Act of 2001 (NCLB), standardized testing in public schools became the law of the land. The ambitious legislation identified test-based accountability as the key to improving schools and, by extension, the long-term prospects of American schoolchildren. Thirteen years later, the debate over the federal…

This article contributes to the body of knowledge on teacher evaluation systems by examining the actual design and performance of new teacher-evaluation systems in four school districts that are at the forefront of the effort to evaluate teachers meaningfully. The authors find first that the ratings assigned teachers by the districts'…

It is widely believed that a good principal is the key to a successful school. No Child Left Behind encouraged the replacement of the principal in persistently low-performing schools, and the Obama administration has made this a requirement for schools undergoing federally funded turnarounds. This study provides new evidence on the importance of…