Background and Purpose: Sleep is an important determinant of health in adolescence, but many adolescents around the world are sleep-deprived. Compared to children and adults, getting enough sleep is especially challenging for adolescents due to the natural alteration of circadian rhythms that govern sleep-wake cycles. The delayed circadian rhythm…

Background: To combat stereotype threat, several school-based field trials have leveraged self-affirmation theory (Steele & Liu, 1983; Liu & Steele, 1986), wherein affirming one's important beliefs and values can buffer against identity threats. Self-affirmation theory posits that individuals are motivated to maintain a positive overall…

Context: The use of educational technology for improving K-12 math education has expanded dramatically recently. ASSISTments (Heffernan & Heffernan, 2014), a widely used digital platform, has seen its use in schools increase significantly from 800 to 20,000 teachers over the past two years. A review of evidence-based online programs by the…

Background: Prior research suggests that stereotype threat explains significant portions of school-based achievement gaps (Steele & Aronson, 1995). To combat stereotype threat, several recent school-based field trials have leveraged self-affirmation theory (Steele & Liu, 1983; Liu & Steele, 1986), wherein affirming one's important…

Nationally, educators suspend Black students at greater rates than any other group (U.S. Department of Education Office for Civil Rights, 2016). This disproportionality is fueled by stereotypes casting Black students as "troublemakers" (Okonofua, Walton, & Eberhardt, 2016)--a label the students too often internalize as part of their…

Introduction: Increasing evidence has shown that student mobility is negatively correlated with individual students' and schools' academic performance (Hanushek, Kain, & Rivkin, 2004; Lara, Mizala, & Repetto, 2011; Sun & Pan, 2014). However, the negative impact may be due to the switching behavior or it could be only a side effect of…

Background: Persisting after experiencing difficulty allows students to work in the upper ends of their zones of proximal development, where most learning occurs (Ventura et al., 2013; Vygotsky & Cole, 1978). Digital educational games promote productive persistence by allowing students to repeat the same or similar problems until they reach…

Background: The importance of high school completion for jobs and postsecondary opportunities is well- documented. Combined with federal laws where high school graduation rate is a core performance indicator, school systems and states face pressure to actively monitor and assess high school completion. This proposal employs machine learning…

Ratio and proportional relationships, along with the interrelated topics of fractions,decimals, and percent, provide a critical foundation for algebra (National Mathematics Advisory Panel, 2008). Proportional reasoning, which not only requires understanding the concept of ratios and that two or more ratios are equal, also requires the ability to…

Background/Context: Increasing evidence suggests a connection between racial differences in rates of exclusionary discipline (suspensions/expulsions) and academic achievement by (Losen & Martinez, 2020; Reardon et al., 2018). Black students receive out-of-school suspensions and expulsions at disproportionately higher rates, which is associated…

Ratio and proportional relationships, along with the interrelated topics of fractions, decimals, and percent provide a critical foundation for algebra (National Mathematics Advisory Panel, 2008). Solving even simple proportion problems is challenging for many children and adolescents. A small number of studies have examined the efficacy of…

Background: As COVID-19 has spread around the world, "how and where students learn" has dramatically changed. Approximately 90% of the U.S schools shifted into virtual learning in April 2020. For the 2020-2021 school year, school districts in the U.S were given the autonomy to decide how they would educate their students. While many…

Background/Context: A minority of U.S. eighth graders reach the proficient level on the National Assessment of Educational Progress (U.S. Department of Education, 2021). Early evidence suggests that the pandemic has made things worse, especially so for underserved student populations (Lewis et al., 2021). Math proficiency is central to advanced…

The Cleveland Metropolitan School District (CMSD) has seen the number of English learner students in grades K-12 increase in recent years, even as overall enrollment has decreased. In addition, the English learner student population has grown more diverse in race/ethnicity, country of origin, and native language. The increasingly diverse English…

Ethnoracial inequality in educational achievement and attainment is a long-standing feature of the American education system. For example, national reading assessments show that White fourth graders scored nearly a standard deviation higher than Black or Hispanic students on average in 2015 (NCES, 2015). The measurement and analysis of differences…