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In recent decades, K-12 school discipline policies and practices have garnered increasing attention among researchers, policymakers, and educators. Disproportionalities in school discipline raise serious questions about educational equity. This study provides a comprehensive review of the extant literature on the contributors to racial, gender, and income disparities in disciplinary outcomes, and the effectiveness of emerging alternatives to exclusionary disciplinary approaches. Our findings indicate that the causes of the disparities are numerous and multifaceted. Although low-income and minority students experience suspensions and expulsions at higher rates than their peers, these differences cannot be solely attributed to socioeconomic status or increased misbehavior. Instead, school and classroom occurrences that result from the policies, practices, and perspectives of teachers and principals appear to play an important role in explaining the disparities. There are conceptual and open empirical questions on whether and how some of the various alternatives are working to counter the discipline disparities.

Although the association between school suspension and deleterious outcomes is widely acknowledged, policy and practice need to be informed by an evidence base derived from multiple studies revealing consistent trends. This meta-analysis aims to address this void by examining the degree to which different types of school suspensions (in-school versus out-of-school) are associated with both academic achievement and school dropout, while concurrently examining study or participant characteristics that moderate these relationships. Data sources included peer-reviewed and non-peer-reviewed studies from 1986-2012 obtained via bibliographic databases. A meta-analysis was conducted on 53 cases from 34 studies. The results revealed a significant inverse relationship between suspensions and achievement, along with a significant positive relationship between suspensions and dropout. Furthermore, study or participant characteristics and type of suspension significantly affected the relationship between suspensions and the outcome variables. Implications for policy, practice, and research are emphasized.

Background/Objectives: National data show that about 250 preschoolers are suspended or expelled daily in the United States. Jump Start is a multi-tiered infant and early childhood mental health consultation program that strengthens early care and education centers’ capacity to support children’s social–emotional development and prevent school suspension and expulsion. This retrospective study examined center-level exclusionary discipline practices, Jump Start participation, and related changes in discipline and expulsion policies. Methods: Data from 270 early care and education centers across Miami-Dade County that received Jump Start services during one of three academic years (2022–2023, 2023–2024, or 2024–2025) were included. Analyses examined associations between baseline exclusionary discipline practices, program duration, discipline and expulsion policy changes, and post-Jump Start exclusionary discipline practices. Results: Statistically significant reductions were observed in the frequency of traditional suspensions/expulsions and soft expulsions following Jump Start participation. The association between the Jump Start duration and post-Jump Start soft expulsions was significantly moderated by changes in center discipline policies, such that Jump Start was effective at reducing soft expulsions only when discipline policies showed meaningful improvement. Conclusions: Infant and early childhood consultation models, such as Jump Start, show promise in reducing exclusionary discipline practices, especially when implementation improves discipline policies.

In the context of a national conversation about exclusionary discipline, we conducted a multilevel examination of the relative contributions of infraction, student, and school characteristics to rates of and racial disparities in out-of-school suspension and expulsion. Type of infraction; race, gender, and to a certain extent socioeconomic status at the individual level; and, at the school level, mean school achievement, percentage Black enrollment, and principal perspectives all contributed to the probability of out-of-school suspension or expulsion. For racial disparities, however, school-level variables, including principal perspectives on discipline, appear to be among the strongest predictors. Such a pattern suggests that schools and districts looking to reduce racial and ethnic disparities in discipline would do well to focus on school- and classroom-based interventions.

A full canon of empirical literature shows that students who are African American, Latinx, or American Indian/Alaskan Native, and students who are male, diagnosed with disabilities, or from low socioeconomic backgrounds are more likely to experience exclusionary discipline practices in U.S. schools. Though there is a growing commitment to mitigating discipline disparities through alternative programming, it is clear that disproportionality in the application of harmful discipline practices persists. The purpose of this literature synthesis was to examine the effectiveness of empirically studied school-based interventions in reducing disproportionality in discipline practices. We analyzed articles that assessed both prevention and intervention program effects using at least one outcome variable representing exclusionary discipline, either in the form of office discipline referrals or suspension/expulsion rates. Included studies used experimental, quasi-experimental, or observational research designs that disaggregated student outcomes by race, ethnicity, gender, disability, or other sociodemographic categories. We identified 20 articles meeting inclusion criteria, four of which provided direct evidence of disproportionality reduction using interaction terms. Results indicate limited evidence that available programs reduce discipline disparities and that common programs may function as a protective factor for White and female students while failing to do so for marginalized students. Findings identify promising areas for future research.

An influential literature in criminology has identified indirect \"collateral consequences\" of mass imprisonment. We extend this criminological perspective to the context of the U.S. education system, conceptualizing exclusionary discipline practices (i.e., out-of-school suspension) as a manifestation of intensified social control in schools. Similar to patterns of family and community decline associated with mass incarceration, we theorize that exclusionary discipline policies have indirect adverse effects on non-suspended students in punitive schools. Using a large hierarchical and longitudinal dataset consisting of student and school records, we examine the effect of suspension on reading and math achievement. Our findings suggest that higher levels of exclusionary discipline within schools over time generate collateral damage, negatively affecting the academic achievement of nonsuspended students in punitive contexts. This effect is strongest in schools with high levels of exclusionary discipline and schools with low levels of violence, although the adverse effect of exclusionary discipline is evident in even the most disorganized and hostile school environments. Our results level a strong argument against excessively punitive school policies and suggest the need for alternative means of establishing a disciplined environment through social integration.

Using student-level administrative data from North Carolina, we explore whether exposure to samerace teachers affects the rate at which Black students receive exclusionary discipline, such as out-of-school suspensions, in-school suspensions, and expulsion. We find consistent evidence that exposure to same-race teachers is associated with reduced rates of exclusionary discipline for Black students. This relationship holds for elementary, middle, and high school grade ranges for male and female students, and for students who do and do not use free and reduced-price lunch. Although we find reductions in referrals for a number of different types of offenses, we find particularly consistent evidence that exposure to same-race teachers lowers office referrals for willful defiance across all grade levels, suggesting that teacher discretion plays a role in driving our results.

Discipline reformers claim that suspensions negatively affect suspended students, while others suggest reforms have unintended consequences for peers. Using student panel data from the School District of Philadelphia, we implement student fixed effects and instrumental variable (IV) strategies to examine the consequences of suspensions for offending students and their peers. A suspension decreases math and reading achievement for suspended students. The effects are robust to IV estimates leveraging a district-wide policy change in suspension use. Suspensions are more salient for students who personally experience suspension than for their peers. Exposure to suspensions for more serious misconduct has very small, negative spillovers onto peer achievement, but does not change peer absences.

Abstract School suspension and expulsion are important forms of punishment that disproportionately affect Black students, with long-term consequences for educational attainment and other indicators of wellbeing. Prior research identifies three mechanisms that help account for racial disparities in suspension and expulsion: between-school sorting, differences in student behaviors, and differences in the treatment and support of students with similar behaviors. We extend this literature by (1) comparing the contributions of these three mechanisms in a single study, (2) assessing behavior and school composition when children enter kindergarten and before most are exposed to school discipline, and (3) using both teacher and parent reports of student behaviors. Decomposition analyses reveal that differential treatment and support account for 46 percent of the Black/White gap in suspension/expulsion, while between-school sorting and differences in behavior account for 21 percent and 9 percent of the gap respectively. Results are similar for boys and girls and robust to the use of school fixed effects and measures of school composition and student behavior at ages 5 and 9. Theoretically, our findings highlight differential treatment/support after children enter school as an important but understudied mechanism in the early criminalization of Black students.

Coral bleaching occurs when stressful conditions result in the expulsion of the algal partner from the coral. Before anthropogenic climate warming, such events were relatively rare, allowing for recovery of the reef between events. Hughes et al. looked at 100 reefs globally and found that the average interval between bleaching events is now less than half what it was before. Such narrow recovery windows do not allow for full recovery. Furthermore, warming events such as El Niño are warmer than previously, as are general ocean conditions. Such changes are likely to make it more and more difficult for reefs to recover between stressful events. Science , this issue p. 80 Coral reefs in the present day have less time than in earlier periods to recover from bleaching events. Tropical reef systems are transitioning to a new era in which the interval between recurrent bouts of coral bleaching is too short for a full recovery of mature assemblages. We analyzed bleaching records at 100 globally distributed reef locations from 1980 to 2016. The median return time between pairs of severe bleaching events has diminished steadily since 1980 and is now only 6 years. As global warming has progressed, tropical sea surface temperatures are warmer now during current La Niña conditions than they were during El Niño events three decades ago. Consequently, as we transition to the Anthropocene, coral bleaching is occurring more frequently in all El Niño–Southern Oscillation phases, increasing the likelihood of annual bleaching in the coming decades.