The change in California's kindergarten entry age, moving the cutoff date from December 2 to September 1, brought about transitional kindergarten for affected children born in the transitional period. This impacted both those who delayed entry and those who didn't. Older entrants might show better readiness and learning skills compared to younger peers, a reason why parents often choose to delay their child's entry ("redshirting"). However, the benefits of this additional year might vary based on available activities. The shift also influences non-delayed children due to grade age averages affecting peer dynamics and learning. In a study assessing this change's impact on crime, incarceration rates dropped by 10-13% among those directly and indirectly affected by the entry age policy. While both groups benefitted, the reduction in crime was smaller for those delaying entry, hinting at potential harms from late entry, perhaps due to less learning during the "redshirt" year or lower educational attainment. This emphasizes early education's long-term benefits, supporting transitional kindergarten's role. Yet, caution is needed in generalizing these findings, considering the availability of alternative pre-kindergarten programs today, absent in earlier decades, possibly lessening the negative impacts of delayed entry.

Education policies often focus on evaluating the effectiveness of interventions without considering their costs. This oversight limits policymakers’ ability to make informed decisions about resource allocation. Understanding intervention costs in relation to their effectiveness is crucial for efficient policymaking. For instance, reducing high school dropout rates, a national priority, could alleviate substantial economic burdens, yet education budgets are limited. Researchers conducted cost-effectiveness analyses on five dropout prevention programs, finding considerable variations in costs and effectiveness. Remedial programs aimed at dropouts were notably more expensive per additional graduate compared to preventative programs, which targeted at-risk students still in school. These findings emphasize the need for cost-effectiveness assessments in educational program evaluations to guide policymaking effectively. Without such analyses, research evidence alone may not provide policymakers with a comprehensive view for decision-making, potentially leading to inefficient resource allocation.

A new survey examines California elementary school officials' awareness of AB-2109, a law tightening personal belief exemptions for school immunizations. Findings revealed limited understanding among respondents, with low awareness and knowledge of the law's details. Only health workers showed better comprehension. Despite this, schools planned to communicate the requirements to parents. Yet, officials highlighted the need for more staff education, district guidance, and support materials. The survey emphasizes the necessity of further information dissemination about AB-2109 to all school staff involved in implementing immunization policies, from enrollment to parent interaction, to ensure effective compliance.

The KIPP network of charter schools aims to enhance academic outcomes for low-income students through rigorous standards and increased classroom time. Mathematica Policy Research conducted a study assessing KIPP's impact, accounting for the differences between students who chose KIPP and those who didn't. Analyzing 41 KIPP middle schools over a decade, they found that students in these schools demonstrated substantial growth in reading and math, equating to 90% of an extra year of math and two-thirds of a year in reading compared to their non-KIPP peers. These positive effects were consistent across most schools and extended to other subjects and low-stakes assessments. Even when employing random admissions lotteries, the impact remained significant. The reasons behind KIPP's success remain ambiguous—whether it's due to instructional strategies, drawing students from underperforming schools, or positive peer effects remains uncertain. Further research is needed to decipher these causes and determine if KIPP's methods could be broadly applicable to improve student achievement in public schools, potentially prompting the adoption of their successful practices in traditional public schools or expanding successful charter networks.

School reform emphasizes transferring decision-making power to individual schools, seen in districts like San Francisco, Los Angeles, and beyond California. Principals gain control over budgets, curricula, schedules, and professional development, aiming to enhance student learning. Yet, the impact of this decentralization on school performance remains largely unknown. In Chicago, a study of an autonomy program revealed increased reading proficiency among elementary students after two years, but no significant gains in math or overall achievement scores. Principals leaned toward autonomy in budgets and curricula. Policy suggestions arise: policymakers must allow time for schools to adapt to autonomy, understanding improvements might not be immediate. They should also avoid neglecting high- or low-achieving students in pursuit of proficiency rates, affecting school evaluations. Further research is crucial to understand how decentralized control affects academic performance, examining how school leaders leverage autonomy to assess its potential for improving schools.