This study examined the within- and between-day variability of time-segmented sedentary behavior (SB), light physical activity (LPA), and moderate-to-vigorous physical activity (MVPA) in adolescents. The sample comprised 154 adolescents (11-16 years old) from two public schools in Florianópolis, Brazil. The proportion of time spent in SB, LPA, and…

Literacy skills are instrumental to unlocking a child's full potential and have a well-established link to long-term life outcomes. Children who can't read at grade level by 3rd grade are four times more likely to drop out of school, have fewer career prospects, and earn lower incomes as adults. However, despite some progress on literacy rates,…

Check-in/check-out (CICO) is an evidence-based multicomponent intervention widely implemented in elementary and middle schools. The purpose of this study was to evaluate whether an adapted CICO intervention, with CICO components designed to be more developmentally appropriate for adolescents and contextually relevant for high schools, could be…

This study was a quasi-experimental design (QED) that examined the impact of Intervene K-12 tutoring on mathematics achievement for Grade 9 ELL students identified by HPS as having experienced considerable learning disruptions as a result of the COVID-19 pandemic and having recently arrived in the United States. Achievement gains for treatment…

We describe results of a long-term design experiment focused on promoting mathematics learning among multilingual ninth graders classified as English Learners. The intervention at a linguistically diverse public high school in the US focused on a unit introducing concepts related to linear rates of change. We analyze results from a…

The purpose of this study was to provide initial evidence of the effectiveness of Check-In/Check-Out-High School (CICO-HS) on high school student outcomes. Check-In/Check-Out-High School is a version of CICO, an established Tier 2 intervention designed to improve student academic and social behavior, adapted to increase effectiveness and…

Purpose: The purpose of the study was to evaluate the implementation and impact of the IDEA Public Schools' Mathematics Curriculum Redesign (MCR) effort, funded by an Innovation and Research (EIR) grant. Methods: The study used a quasi-experimental matching design to examine the effect of MCR on student achievement outcomes. The study compared…

Objective: This study evaluated the longitudinal impact of the Teen Outreach Programme (TOP) on adolescent pregnancy, sexual behaviour, risky sex and sexual intentions in non-metropolitan high schools. Design: Pair-matched, cluster randomised controlled trial. Setting: Non-metropolitan public high schools in Florida, USA. Methods: TOP was…

In this study, researchers evaluated the effects of peer-assisted multimedia vocabulary instruction, which was designed to address the goal of building knowledge of discipline-specific definitions of language arts terminology for six ninth-grade English Language Learners (ELLs) with or at-risk for learning disabilities. To evaluate the effects of…

The purpose of this study was to determine if student on-task behavior varied when a) the One Teach/One Assist co-teaching model was applied or b) when the Team Teaching model was applied using an alternating treatment design for four students in a co-taught Algebra I classroom. Results show that participants experienced increased on-task behavior…

Background: Youth of color from low-income urban communities are crucial participants in research, as their involvement can shape effective, culturally responsive interventions and policy to promote youth health and well-being. These young people, however, are an often-neglected research population, due in part to perceived challenges associated…

Around the country, high school teachers are being called upon to improve student writing, but they often lack the tools and requisite know-how to make a difference. An ambitious new program called Drive to Write is attempting to change that. This report describes an evaluation of the program's implementation in 11 public high schools in New York…

Questions regarding the generalizability of results from educational experiments have been at the forefront of methods development over the past five years. This work has focused on methods for estimating the effect of an intervention in a well-defined inference population (e.g., Tipton, 2013; O'Muircheartaigh and Hedges, 2014); methods for…

Although several studies investigate the effects of school resources on student performance, these studies tend to focus more on intervention effect sizes than on their cost-effectiveness. Exploiting policy-induced variation in Denmark and using high-quality administrative data, we investigate the effects of a school intervention that introduces…

Purpose: Within the framework of Health Promoting Schools "Up" is an intervention using a whole school approach aimed at promoting mental health by strengthening social and emotional competence among schoolchildren. Social and emotional competence is an integral part of many school-based mental health interventions but only a minority of…