While policymakers have demonstrated considerable enthusiasm for "science of reading" initiatives, the evidence on the impact of related reforms when implemented at scale is limited. In this pre-registered, quasi-experimental study, we examine California's recent initiative to improve early literacy across the state's lowest-performing…

Many factors contribute to the achievement gap in the U.S. As an intervention to help narrow the gap, tutoring presents a potentially powerful solution. Decades of research suggest that tutoring is an effective, evidence-based approach to improve student success, with effect sizes ranging from 0.4. to 2.0. As many school systems in the U.S. move…

Budget constraints and limited supplies of local tutors have caused many K-12 school districts to pivot from individual tutoring in-person toward small-group tutoring online to expand access to personalized instruction. We conduct a field experiment to explore the effect of increasing student-tutor ratios on middle school students' math…

While America is becoming increasingly diverse, educational stakeholders seek programs that address varied language and cultural needs, which is reflected by the growing popularity of dual language immersion (DLI) programs in recent decades. The problem is an extensively persistent academic achievement gap between students with native English and…

The National Math + Science Initiative (NMSI) is a nonprofit organization committed to improving educational outcomes that traces its roots back to the early 1990s. NMSI's College Readiness Program (CRP) is a long-standing program with the goal of promoting STEM education in high schools to improve students' preparation for college. The three-year…

School-wide positive behavior interventions and supports (SWPBIS) is widely implemented across the United States. Evidence suggests that SWPBIS, when implemented with fidelity, has a significant and positive impact on schools, including lower suspensions and higher reading and mathematics achievement. A critical component of this research is…

The college readiness of high school graduates has become a core objective of the education policy of the United States. Early college readiness programs now exist in 38 states, and early college transition curricula have been developed in 29 states. This article evaluates the oldest of these programs, the Early Assessment Program (EAP), operated…

This report concludes a multiyear series of implementation studies intended to inform the California State University (CSU) system about the implementation of Executive Order 1110 (EO 1110). A major policy established in 2017, EO 1110 requires CSU campuses to eliminate noncredit developmental courses (often known as "remedial" courses)…

The paper evaluates math performance at four high-need middle schools during a four-year intervention, which was designed to help math teachers diagnose students' areas of need and to design lesson plans responsive to those needs. Before the intervention began, the researchers pre-selected four comparison schools by matching based on achievement…

Lesson study, especially when conducted with support from targeted resources, is often identified as a potentially effective means to support teacher learning. In this study, 80 school-based teams of educators, representing 80 classrooms of third- or fourth-grade students in the US, were randomly assigned to one of four conditions: lesson study…

Research Experiences for Teachers (RET) programs are a burgeoning approach to engage teachers in STEM (science, technology, engineering, mathematics) research that they can translate into their K-12 classrooms. Despite an increase in studies of RETs, there is a need for comparison of RET and non-RET teachers' student outcomes. This mixed methods,…

The purpose of this study is to evaluate the implementation and impacts of the Building Assets, Reducing Risks (BARR) model in its first year of implementation in 66 schools across the U.S. and to document scale-up progress during the Investing in Innovation (i3) grant period (2017-2021). The impact evaluation included 21,529 9th grade students…

Tiered instructional supports are on a steep growth trajectory in the US and getting underway internationally as a means to providing equitable education to all student groups. In the US, the Department of Education funded the expansion of multi-tiered system of support (MTSS) through school and personnel improvement grants to states. This…

In an effort to make math courses more relevant and improve success rates in college math, various organizations and colleges developed a new model of math education that has come to be called "math pathways." Math pathways enable students to take different paths through the math curriculum, depending on their course of study. With math…

Continuous improvement is a holistic and research-based approach to education grounded in the belief that every system is designed to achieve the results it gets; therefore, change must be systemwide, not piecemeal. California is a national leader in the continuous improvement movement that is spreading throughout local school districts as well as…