College Guidance for All: A Randomized Experiment in Pre‐College Advising

Pre‐college advising programs exist in most disadvantaged high schools throughout the United States. These programs supplement traditional advising by high school guidance counselors and attempt to help underrepresented and disadvantaged students overcome the complexities of the postsecondary admission and financial aid processes. Existing evidence on these programs often uses within‐school randomization where spillovers and alternative supports may confound estimates. We provide the first evidence on a whole school intervention resulting from a school‐level randomized controlled trial in the United States. The college access program we study uses a near‐peer model where a recent college graduate works at the school assisting students in the application and enrollment process. Pooled results across the first three years of program implementation find no significant impacts on overall college enrollment. However, subgroup analyses reveal positive, significant effects among the groups most targeted by the intervention: Hispanic and low‐income students. Most of the impact comes through increasing two‐year college enrollment, but this appears to be new entrants rather than inducing students to move from four‐year to two‐year colleges. The observed positive effects for these subgroups attenuate over time. We attribute this drop in the estimated impact to departures in fidelity of the experiment. Even among the cohorts for which we find positive enrollment impacts, we find no significant impacts on college persistence.     

The Effects of Tulsa's Pre‐K Program on Middle School Student Performance

As states have upgraded their commitment to pre‐K education over the past two decades, questions have arisen. Critics argue that program effects are likely to fade out or disappear over time, while supporters contend that program effects are likely to persist under certain conditions. Using data from Tulsa Public Schools, three neighboring school districts, and the state of Oklahoma, and propensity score weighting, we estimate the effects of Tulsa's universal, school‐based pre‐K program on multiple measures of academic progress for middle school students. We find enduring effects on math achievement test scores, enrollment in honors courses, and grade retention for students as a whole, and similar effects for certain subgroups. We conclude that some positive effects of a high‐quality pre‐K program are discernible as late as middle school.     

Is Information Enough? The Effect of Information about Education Tax Benefits on Student Outcomes

There is increasing evidence that tax benefits for college do not affect college enrollment. This may be because prospective students do not know about tax benefits for college or because the design of tax benefits is not conducive to affecting educational outcomes. We focus on changing awareness of tax benefits by providing information to students or prospective students. We sent e‐mails and letters to students that described tax benefits for college, and we tracked college outcomes. For all three of our samples—rising high school seniors, already enrolled students, and students who had previously applied to college but were not currently enrolled—information about tax benefits for college did not affect enrollment or reenrollment. We test whether effects vary according to information frames and found that no treatment arms changed student outcomes. We conclude that awareness is not the primary reason that tax benefits for college do not affect enrollment.     

Keeping College Options Open: A Field Experiment to Help all High School Seniors Through the College Application Process

Recent research suggests that the college application process itself prevents access. This paper reports results from a school‐based experiment in which application assistance is incorporated into the high school curriculum for all graduating seniors at low‐transition schools. Over three workshops, students were guided to pick programs of interest that they were eligible for, apply for real, and complete the financial aid application. The goal was to create a real college option for exiting students to make the transition easier and more salient. Among all graduating seniors, the program increased application rates by 15 percentage points, and college going rates by 5 percentage points. Among those not taking advanced‐level courses, college enrollment increased by 9 percentage points. The program generated significant effects for a wide range of heterogeneous groups, including both males and females, those from urban and rural schools, and those with above and below average grades. While more intensive than other tested approaches, in‐class application assistance may provide a more effective approach for bridging the gap towards higher education.     

The Forgotten Summer: Does the Offer of College Counseling After High School Mitigate Summer Melt Among College‐Intending,Low‐Income High School Graduates?

Despite decades of policy intervention to increase college entry and success among low‐income students, considerable gaps by socioeconomic status remain. To date, policymakers have overlooked the summer after high school as an important time period in students’ transition to college, yet recent research documents high rates of summer attrition from the college pipeline among college‐intending high school graduates, a phenomenon we refer to as “summer melt.” We report on two randomized trials investigating efforts to mitigate summer melt. Offering college‐intending graduates two to three hours of summer support increased enrollment by 3 percentage points overall, and by 8 to 12 percentage points among low‐income students, at a cost of $100 to $200 per student. Further, summer support has lasting impacts on persistence several semesters into college.     

Sinking Swann: Public School Choice and the Resegregation of Charlotte's Public Schools

Public school choice is a widely used tool for education reform and may be a way to improve school accountability and efficiency. This article examines what happened to student outcomes when Charlotte‐Mecklenburg Schools, a large and diverse urban school district located in North Carolina, changed its assignment policy to one of open enrollment with mandatory choice. The previous policy used a broad array of magnet schools and a limited amount of mandatory busing to achieve desegregation. The new policy required that all students choose a school, and it specifically avoided using race or ethnicity considerations in assigning students. The article examines the impacts of the new policy on the end‐of‐grade standardized tests in reading and math. The article uses regression analysis to discover whether the scores of various groups of students increased or decreased after the policy change. The analysis suggests that the “race‐neutral” assignment policy was neither neutral in the opportunity it provided students to attend their school of choice nor in its academic outcomes. Anglo students were more likely to receive their first choice of schools and to improve their scores. African American students were less likely to receive their first choice school and their scores declined.     

Experimental Evidence on the Effect of Childhood Investments on Postsecondary Attainment and Degree Completion

This paper examines the effect of early childhood investments on college enrollment and degree completion. We used the random assignment in Project STAR (the Tennessee Student/Teacher Achievement Ratio experiment) to estimate the effect of smaller classes in primary school on college entry, college choice, and degree completion. We improve on existing work in this area with unusually detailed data on college enrollment spells and the previously unexplored outcome of college degree completion. We found that assignment to a small class increases students’ probability of attending college by 2.7 percentage points, with effects more than twice as large among black students. Among students enrolled in the poorest third of schools, the effect is 7.3 percentage points. Smaller classes increased the likelihood of earning a college degree by 1.6 percentage points and shifted students toward high‐earning fields such as STEM (science, technology, engineering, and mathematics), business, and economics. We found that test‐score effects at the time of the experiment were an excellent predictor of long‐term improvements in postsecondary outcomes.     

Patrolling Public Schools: The Impact of Funding for School Police on Student Discipline and Long‐term Education Outcomes

As police officers have become increasingly common in U.S. public schools, their role in school discipline has often expanded. While there is growing public debate about the consequences of police presence in schools, there is scant evidence of the impact of police on student discipline and academic outcomes. This paper provides the first quasi‐experimental estimate of funding for school police on student outcomes, leveraging variation in federal Community Oriented Policing Services (COPS) grants. Exploiting detailed data on over 2.5 million students in Texas, I find that federal grants for police in schools increase middle school discipline rates by 6 percent. The rise in discipline is driven by sanctions for low‐level offenses or school code of conduct violations. Further, I find that Black students experience the largest increases in discipline. I also find that exposure to a three‐year federal grant for school police is associated with a 2.5 percent decrease in high school graduation rates and a 4 percent decrease in college enrollment rates.     

Heterogeneous Effects of Early Algebra across California Middle Schools

How should schools assign students to more rigorous math courses so as best to help their academic outcomes? We identify several hundred California middle schools that used 7th-grade test scores to place students into 8th-grade algebra courses and use a regression discontinuity design to estimate average impacts and heterogeneity across schools. Enrolling in 8th-grade algebra boosts students’ enrollment in advanced math in ninth grade by 30 percentage points and eleventh grade by 16 percentage points. Math scores in tenth grade rise by 0.05 standard deviations. Women, students of color, and English-language learners benefit disproportionately from placement into early algebra. Importantly, the benefits of 8th-grade algebra are substantially larger in schools that set their eligibility threshold higher in the baseline achievement distribution. This suggests a potential tradeoff between increased access and rates of subsequent math success.     

Experimental Evidence on the Impacts of Need-Based Financial Aid: Longitudinal Assessment of the Wisconsin Scholars Grant

We conduct the first long-term experimental evaluation of a need-based financial aid program, the privately funded Wisconsin Scholars Grant. Over multiple cohorts, the program failed to increase degree completion and graduate school enrollment up to 10 years after matriculation. The program did reduce time-to-degree for some students and modestly increased the number of STEM degrees earned. The lack of robust effects raises important questions about the conditions necessary for financial aid to benefit students.     

Explaining race,poverty, and gender disparities in advanced course‐taking

We use panel data on Florida high school students to examine race, poverty, and gender disparities in advanced course‐taking. While white students are more likely to take advanced courses than black and Hispanic students, these disparities are eliminated when we condition on observable pre–high school characteristics. In fact, black and Hispanic students are more likely than observably similar white students to take advanced courses. Controlling for students' pre–high school characteristics substantially reduces poverty gaps, modestly reduces Asian–white gaps, and makes little dent in female–male gaps. Black and Hispanic students attend high schools that increase their likelihood of taking advanced courses relative to observably similar white students; this advantage is largely driven by minorities disproportionately attending magnet schools. Finally, recent federal and state efforts aimed at increasing access to advanced courses to poor and minority students appear to have succeeded in raising the share of students who take advanced courses from 2003 to 2006. However, secular trends (or spillovers of the policies to non‐poor, non‐minority students) have spurred faster growth for other students, contributing to widening demographic gaps in these years. © 2009 by the Association for Public Policy Analysis and Management.     

Let Them Eat Lunch: The Impact of Universal Free Meals on Student Performance

This paper investigates the impact of extending free school lunch to all students, regardless of income, on academic performance in New York City middle schools. Using a difference-in-differences design and unique longitudinal, student-level data, we derive credibly causal estimates of the impacts of “Universal Free Meals” (UFM) on test scores in English Language Arts (ELA) and mathematics, and participation in school lunch. We find UFM increases academic performance by as much as 0.083 standard deviations in math and 0.059 in ELA for non-poor students, with smaller, statistically significant effects of 0.032 and 0.027 standard deviations in math and ELA for poor students. Further, UFM increases participation in school lunch by roughly 11.0 percentage points for non-poor students and 5.4 percentage points for poor students. We then investigate the academic effects of school lunch participation per se, using UFM as an instrumental variable. Results indicate that increases in school lunch participation improve academic performance for both poor and non-poor students; an additional lunch every two weeks increases test scores by roughly 0.08 standard deviations in math and 0.07 standard deviations in ELA. Finally, we explore potential unintended consequences for student weight outcomes, finding no evidence that UFM increases the probability that students are obese or overweight. We also find no evidence of increases in average body mass index (BMI). Instead, we find some evidence that participation in school lunch improves weight outcomes for non-poor students. Results are robust to an array of alternative specifications and assumptions about the sample.     

Can Light-Touch College-Going Interventions Make a Difference? Evidence from a Statewide Experiment in Michigan

I conduct a statewide experiment in Michigan with nearly 50,000 high-achieving high school seniors. Treated students are mailed a letter encouraging them to consider college and providing them with the web address of a college information website. I find that very high-achieving, low-income students, and very high-achieving, minority students are the most likely to navigate to the website. Small changes to letter content affect take-up. For example, highlighting college affordability induces 18 percent more students to the website than highlighting college choice, and 37 percent more than highlighting how to apply to college. I find a statistically precise zero impact on college enrollment among all students who were mailed the letter. However, low-income students experience a small increase in the probability that they enroll in college, driven by increases at four-year institutions. An examination of persistence through college, while imprecise, suggests that the students induced into college by the intervention persist at a lower rate than the inframarginal student.     

College Enrollment and Completion Among Nationally Recognized High‐Achieving Hispanic Students

Hispanic high school graduates have lower college completion rates than academically similar white students. As Hispanic students have been theorized to be more constrained in the college search and selection process, one potential policy lever is to increase the set of colleges to which these students apply and attend. In this paper, we investigate the impacts of the College Board's National Hispanic Recognition Program (NHRP), which recognizes the highest‐scoring 11th‐grade Hispanic students on the PSAT/NMSQT, as a mechanism of improving college choice and completion. The program not only informs students about their relative ability, but it also enables colleges to identify, recruit, and offer enrollment incentives. Overall, we find that the program has strong effects on college attendance patterns, shifting students from two‐year to four‐year institutions, as well as to colleges that are out‐of‐state and public flagships, all areas where Hispanic attendance has lagged. NHRP shifts the geographic distribution of where students earn their degree, and increases overall bachelor's completion among Hispanic students who traditionally have had lower rates of success. These results demonstrate that college outreach can have significant impacts on the enrollment choices of Hispanic students and can serve as a policy lever for colleges looking to draw academically talented students.     

Charter High Schools’ Effects on Long‐Term Attainment and Earnings

Since their inception in 1992, the number of charter schools has grown to more than 6,800 nationally, serving nearly three million students. Various studies have examined charter schools’ impacts on test scores, and a few have begun to examine longer‐term outcomes including graduation and college attendance. This paper is the first to estimate charter schools’ effects on earnings in adulthood, alongside effects on educational attainment. Using data from Florida, we first confirm previous research (Booker et al., 2011 ) that students attending charter high schools are more likely to graduate from high school and enroll in college. We then examine two longer‐term outcomes not previously studied in research on charter schools—college persistence and earnings. We find that students attending charter high schools are more likely to persist in college, and that in their mid‐20s they experience higher earnings.     

再探大学生语音问题及对策

语音是语言学习的基石,大学生的英语语音问题大多来自于初高中英语学习的启蒙阶段,如果这些问题在进入大学时得不到解决将会对他们之后学习大学英语带来更为严重的问题。解决这些问题的对策是为大一新生开设专门的语音课程解决他们的"历史遗留"问题,最大限度地防止其他问题的出现。     

What Does Free Community College Buy? Early Impacts from the Oregon Promise

This paper examines the Oregon Promise, a state-level program that exclusively subsidizes in-state community college attendance. I estimate impacts using a difference-in-difference design that links students in states with essentially universal 10th-grade PSAT coverage to national-level postsecondary enrollment data. I find that the implementation of the Oregon Promise increased enrollment at two-year colleges by roughly four to five percentage points for the first two eligible cohorts. In the first year of the program, the increase in community college enrollment comes primarily from students shifting out of four-year colleges, whereas in the second year the program predominately increases overall postsecondary enrollment.     

The impact of the Texas top ten percent law on college enrollment: A regression discontinuity approach

We use regression discontinuity methods on a representative survey of Texas high school seniors to discern the impact on flagship‐enrollment behavior of the Texas top 10 percent law, which guarantees admission to any Texas public university to students who graduate in the top decile of their class. By comparing students at and immediately below the cut‐point for automatic admission, we find that the top 10 percent law affects flagship enrollment of Hispanic students eligible for the admission guarantee, as well as rank‐eligible graduates from high schools where minority students predominate and from high schools with the state average share of economically disadvantaged students. Our findings are robust to various model specifications and different bandwidth choices using local linear estimation. © 2010 by the Association for Public Policy Analysis and Management.     

Using Carrots and Sticks to Improve American Colleges

An unintended consequence of making access to college an entitlement readily available to all high school graduates is that serious study in high school has become optional—even for those intending to apply for college admission. Without an incentive to study diligently, many students are disengaged in high school and, as a result, underprepared for college. Some freshmen arrive at college thinking that having fun is the main reason they are at college and that the pursuit of knowledge should be available for when they have nothing better to do. Before World War II academically excellent students from families unable to finance college for them could apply for competitive scholarships. Scholarships mutated into “financial aid” when the GI Bill of Rights financed college for discharged veterans of World War II. Pell grants should continue to be available to youngsters who want to go to college even if they are mediocre students—provided they can persuade a college to admit them. Mediocre students are being given a chance to become “late bloomers.” Loans, however, are expected to be repaid, and mediocre high school students with bad credit ratings are likely to default on their loans, causing serious financial problems for themselves and financial complications for the American economy. Targeting loans to students with good prospects for repaying them is more prudent financially and makes more sense educationally.     

《数控加工设备》的教学体会与思考

《数控加工设备》是高职学院“机械制造与自动化”等相关专业的主干课程。本文根据以往教学实践，结合高职学生的培养目标和学生的素质特点，探讨了《数控加工设备》的教学体会与思考。