This paper explores treatment effects in three different contexts: an extended school year pilot program in an urban school district, a library summer reading program serving twenty-one urban school districts, and states passing the Equal Rights Amendment during the 1970s and 1980s. Estimates generated using two years of intervention data along…

The purpose of the present study was to gather summative and formative data related to the implementation of Zearn Math during the first year of a two-year study. The sample included students in a large urban school district comprised of predominantly African American (58%) and Hispanic (28%) students. Roughly 90% of students are economically…

Using testing data from 2.1 million students in 10,000 schools in 49 states (plus D.C.), we investigate the role of remote and hybrid instruction in widening gaps in achievement by race and school poverty. We find that remote instruction was a primary driver of widening achievement gaps. Math gaps did not widen in areas that remained in-person…

We examined the degree to which assessment of teachers' instructional and behavior management practices, as measured by the Classroom Strategies Assessment System (CSAS; Reddy & Dudek, 2014), relates to gains in student achievement as measured by the Measures of Academic Progress (Northwest Evaluation Association [NWEA], 2011). Two-level…

Previous studies about ELs have reported data on active English Learners--defined as those students who have not yet reached proficiency on a state English test--at a specific moment in time. This study, for the first time, analyzed the long-term trajectories of 18,000 CPS students who began kindergarten as ELs and followed their progress all the…

This interim report from the RAND Corporation is the first in what will be a series of research reports based on an ongoing long-term study of foundation-funded schools that are using a variety of approaches to personalized learning. Although the early results are encouraging, the study does not attempt to make claims about which aspects of these…

The basic concept of personalized learning (PL) -- instruction that is focused on meeting students' individual learning needs while incorporating their interests and preferences -- has been a longstanding practice in U.S. K-12 education. Options for personalization have increased as personal computing devices have become increasingly affordable…