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The Advanced Placement (AP) program offers an opportunity for students to earn college credit and develop college-ready skills in high school The curriculum was initially designed for \"superior\" students at exclusive private schools. Recently, however, the AP program has expanded to serve more students from marginalized backgrounds, and equitable access has become one of its core objectives. Scholars have questioned whether AP can continue to offer effective college preparation while expanding beyond the populations it was initially designed to serve. This literature review summarizes existing research on whether the AP program has achieved its dual goals of equal access and effectiveness. The extant literature suggests that, despite impressive gains in access to AP, significant barriers remain to its becoming a program that ensures equal access for all students and effectively prepares them for college coursework. Assessing whether these barriers can be overcome, however, demands new approaches to AP research.

This article documents the patterns of White-Black and White-Hispanic enrollment gaps in Advanced Placement (AP) and Dual Enrollment (DE) programs across thousands of school districts in the United States by merging several data sources. We show that the vast majority of districts have racial enrollment gaps in both programs, with wider gaps in AP than DE. Results from fractional regression models indicate that geographic variations in these gaps can be by both local and state factors. We also find that district-level resources and state policies that provide greater access to AP and DE are also associated with wider racial enrollment gaps, implying that greater resources may engender racial disparity without adequate efforts to provide equitable access and support for minority students.

We characterize the extent to which Black-White gaps for multiple educational outcomes are linked across school districts in the United States. Gaps in disciplinary action, grade-level retention, classification into special education and Gifted and Talented, and Advanced Placement course-taking are large in magnitude and correlated. Racial differences in family income and parent education are strikingly consistent predictors of these gaps, and districts with large gaps in one outcome are likely to have large gaps in another. Socioeconomic and segregation variables explain 1.7 to 3.5 times more variance for achievement relative to nonachievement outcomes. Systemic patterns of racial socioeconomic inequality drive inequalities across multiple educational outcomes; however, discretionary policies at local levels are more influential for nonachievement outcomes.

The rise in college preparatory coursework across American high schools appears not to affect college enrollment and graduation rates. This study uses the Civil Rights Data Collection to evaluate three stages along the college preparatory pipeline: access to, enrollment in, and mastery of Advanced Placement® and International Baccalaureate® coursework to understand the cumulative academic opportunities shaping students' college readiness. Leaks in the pipeline divert out historically marginalized students. An adaptation of the Herfindahl-Hirschman Index captures the magnitude of these racial and ethnic disparities. Social context explains where school and district resources alleviate disparities to provide more equitable (i.e., proportionally representative) academic opportunities. These findings offer substantive direction to improve equality in students' college readiness opportunities.

As part of their strategies to increase college readiness and reduce educational inequalities, at least 29 states subsidize Advanced Placement (AP) exam fees for low-income students. However, while Michigan’s state-level policy subsidized low-income student exams to $5 per exam, we found wide-ranging fee structures at high schools—from $0 to $50. Through a lens of policy implementation theory and using an embedded case study approach, this study examined this disjuncture between the state and school policies using interview data from 33 school personnel—counselors, AP Coordinators, administrators—in 31 high schools and state personnel in Michigan; state policy artifacts; and publicly available school data. We identified three major challenges—many schools hedged and set higher fees because they were unsure how much the legislature would approve each year; the state subsidy did not account for additional exam costs (e.g., exam proctors) that were passed down to the student; and the policy as written lacked enforceability and accountability. Policymakers were largely unaware of the amount schools ultimately charged low-income students. In the presence of an ambiguous policy and constrained resources, school personnel relied on their personal perspectives on fees and behavior (e.g., the need to reduce moral hazard and increase “skin in the game”) to rationalize low-income students fees. Together, these findings help explain how low-income students pay vastly different AP exam fees depending on the high school they attend in Michigan—with some schools severely impeding low-income students’ college preparatory opportunities.

There is substantial evidence on the effectiveness of many forms of advanced education, especially various approaches to acceleration, ability grouping, and curricular innovations such as structured curriculum and enrichment. Nonetheless, additional research on the ways in which advanced education impacts the learning and lives of students across the variables of class, race, ethnicity, and gender is still needed, as it is for most educational interventions. Jonathan Plucker and Carolyn Callahan share the evidence base for several popular strategies and describe what evidence is still needed.

Despite policy efforts to increase Advanced Placement (AP) course-taking among Black students, gaps in AP course-taking persist. Many question whether offering more AP courses is a sufficient policy solution. However, few studies have examined the effect of course offerings on disparities within racially diverse high schools. Using national school-level data from the Office for Civil Rights and an instrumental variable approach, we estimated the effect of AP course offerings on within-school Black-White gaps in AP course-taking. We found an additional AP course increased the Black-White AP gap in schools by 1.1 percentage points, net of other variables.

Advancement to postsecondary education for English language learners (ELLs) can be seriously constrained by a lack of academic preparation during high school. Currently, ELLs lag behind their non-ELL peers in their level of access to advanced college-preparatory courses. Through a qualitative case study of ELL education at a large public high school, we examine the educational practices that result in ELLs' restricted curricular choices. The findings expose the way in which ELLs' chances for rigorous academic preparation are systematically reduced and point to the importance of providing ELLs with high-level academic curriculum while also supplying linguistic scaffolding that makes such learning possible.

Millions of high school students take Advanced Placement (AP) courses, which can provide college credit. Using nationally representative data, I identify a diverse set of higher education outcomes that are related to receipt of AP college credit. Institution fixed effects regression reduces bias associated with varying AP credit policies and student sorting across higher education. Results indicate college credits earned in high school are related to reduced time to degree, double majoring, and more advanced coursework. Bounding exercises suggest the time to degree and double major outcomes are not likely driven by bias from unobserved student characteristics. Policies used to support earning college credits while in high school appear to enhance undergraduate education and may accelerate time to degree.

A team of researchers wanted to learn whether AP teachers using a project-based learning (PBL) approach could develop students’ deep learning of knowledge and skills while preparing them for their AP exams. They used a randomized controlled trial to evaluate the Knowledge in Action (KIA) project-based curricula for AP courses. KIA students outperformed non-KIA students on AP exams, including within subgroups. Though the shift to PBL required considerable pedagogical changes, teachers and students perceived benefits beyond AP performance, and the majority of teachers planned to continue using PBL after the study. The pattern of results was consistent for two years and in two courses, AP U.S. Government and AP Environmental Science. Results support teacher-driven adoption of KIA for students from both lower- and higher-income households and in both courses.