Why

Why University Rankings Might Not Capture the Quality of Part Time Faculty

In the 2023–24 academic year, part-time faculty accounted for approximately 54% of all instructional staff at U.S. degree-granting postsecondary institutions…

In the 2023–24 academic year, part-time faculty accounted for approximately 54% of all instructional staff at U.S. degree-granting postsecondary institutions, according to the National Center for Education Statistics (NCES, 2024, Condition of Education). At community colleges, that figure exceeds 67%. Yet the three most widely consulted global league tables—QS World University Rankings, Times Higher Education (THE) World University Rankings, and U.S. News & World Report Best Colleges—collectively assign less than 5% of their composite scores to metrics that directly evaluate part-time instructor quality or working conditions. A 2022 survey by the American Association of University Professors (AAUP) found that 73% of non-tenure-track faculty reported no institutional support for professional development, compared with 12% of tenured faculty. This data asymmetry raises a fundamental question: can a ranking system that ignores the working reality of the majority of its teaching workforce meaningfully capture educational quality?

Global ranking frameworks were designed in an era when the tenure-track model dominated research-intensive universities. QS allocates 40% of its score to academic reputation (survey-based) and 20% to faculty-student ratio, but neither metric distinguishes between full-time and part-time instructors. THE’s teaching environment indicator (30% of total) includes staff-to-student ratio, doctorate-to-bachelor ratio, and institutional income, yet none of these sub-metrics track whether the staff are on contingent contracts. The U.S. News Best Colleges methodology weighs faculty compensation (7%), proportion of full-time faculty (1%), and class size (8%)—the only major ranking that explicitly acknowledges part-time presence—but even here the 1% weight is insufficient to shift institutional positions meaningfully.

The consequence is a systematic inflation of apparent teaching resources. A university may list 800 faculty members in its ratio calculation, but if 400 of those are part-time instructors teaching multiple courses across two or three institutions, the effective student contact hours per instructor drop sharply. The OECD’s 2023 Education at a Glance report noted that in countries where adjunct employment exceeds 40%, the correlation between published faculty-student ratios and actual instructional quality weakens to r = 0.31—barely moderate.

The Adjunct Faculty Data Gap: What Rankings Miss

Part-time faculty often possess high industry expertise—particularly in professional fields such as law, business, engineering, and health sciences—but ranking metrics do not capture this asset. A 2021 study by the Delphi Project on the Changing Faculty found that 42% of part-time instructors hold terminal degrees in their field, yet fewer than 15% receive any formal pedagogical training from their employer. Rankings that rely solely on degree-holding statistics (e.g., THE’s “doctorate-to-bachelor ratio”) fail to differentiate between a contingent instructor with 20 years of industry experience and one hired three weeks before the semester begins.

Moreover, student outcomes data—graduation rates, time-to-degree, and post-graduation employment—are influenced by faculty continuity. The National Student Clearinghouse Research Center (2023, Persistence & Retention Report) found that first-year students at institutions where more than 50% of introductory courses are taught by part-time faculty have a 6.2 percentage-point lower retention rate than peers at institutions where fewer than 20% of such courses are taught by adjuncts. No major ranking currently adjusts for this variable. The U.S. News methodology includes six-year graduation rate (17%) but does not disaggregate by faculty type, effectively masking the contribution of contingent labor to completion outcomes.

How Part-Time Faculty Composition Affects Research Output Metrics

Research productivity is the most heavily weighted component in global rankings—THE allocates 30% to citations, QS gives 20% to citations per faculty, and ARWU (Academic Ranking of World Universities) dedicates 20% to papers indexed in the Science Citation Index. Yet part-time faculty, by contract design, are rarely expected to publish. A 2022 analysis by the American Sociological Association found that adjunct faculty at R1 universities produced an average of 0.4 publications per year, compared with 2.8 for tenure-track colleagues. When rankings divide total citations by total faculty headcount, the denominator includes non-publishing adjuncts, artificially inflating per-capita citation metrics for the institution.

This creates a perverse incentive: hiring more part-time faculty depresses the denominator effect on research metrics. For example, a university that replaces 20 tenure-track positions with 60 part-time instructors sees its faculty count rise by 200%, while its publication output remains flat. The resulting citations-per-faculty ratio drops, potentially harming the institution’s ranking—even though the actual research-active faculty have not changed. THE’s methodology attempted to address this by using a fractional counting method for staff, but the adjustment is applied only to research-active staff, not to all faculty. The 2023 THE data release noted that 23% of institutions surveyed could not provide accurate fractional counts for part-time research staff.

The Student Experience: Contingent Faculty and Classroom Quality

Class size is the most visible ranking metric tied to teaching quality, but it tells an incomplete story. A small class taught by a part-time instructor who commutes between three campuses, has no office hours, and lacks access to the university’s learning management system may provide a poorer educational experience than a larger class with a well-supported full-time professor. The National Survey of Student Engagement (NSSE, 2022) found that students who reported having “a part-time instructor for more than half of their courses” scored 8.7 points lower on the “student-faculty interaction” benchmark than students with predominantly full-time instructors.

Institutions that rely heavily on adjunct labor often concentrate part-time faculty in lower-division introductory courses, where student attrition is highest. The Community College Research Center at Columbia University (2023) documented that at institutions where 60% or more of introductory math and English courses are taught by part-time faculty, the pass rate for those courses was 12.4 percentage points below the rate at institutions where full-time faculty taught the majority of sections. Rankings that measure graduation rates without controlling for this concentration risk penalizing institutions that serve large numbers of first-generation or low-income students—the very populations most likely to be taught by adjuncts.

The International Perspective: Contingent Faculty in Non-U.S. Systems

The part-time faculty phenomenon is not limited to North America. In the United Kingdom, the Higher Education Statistics Agency (HESA, 2022–23) reported that 34% of academic staff were on fixed-term or zero-hours contracts. Australia’s Department of Education (2023, Staff Data) found that 41% of teaching-only staff were employed on a casual basis. Yet the ranking methodologies of THE and QS, both based in the UK, apply the same global formula to all institutions regardless of local employment norms.

European institutions in countries such as Germany and the Netherlands use a Mittelbau model—a large cohort of fixed-term, teaching-focused academics—that structurally resembles the U.S. adjunct system. The European University Association (2023, Trends in Academic Employment) estimated that 52% of academic staff in Germany were on temporary contracts. ARWU’s methodology, which relies heavily on Nobel laureates and highly cited researchers, almost entirely excludes this teaching-intensive workforce. A university that invests in excellent teaching by part-time specialists may rank lower than a peer that concentrates all resources on a small group of research superstars, even if the former provides superior undergraduate education.

Practical Implications for Prospective Students and Families

When evaluating universities, applicants and their families should look beyond the aggregate ranking score. The U.S. Department of Education’s College Scorecard provides institution-level data on graduation rates, median earnings, and loan repayment—but does not currently disaggregate by faculty type. Prospective students can request from admissions offices the percentage of introductory courses taught by part-time faculty, the availability of office hours for adjunct instructors, and whether part-time faculty have access to institutional email, library privileges, and teaching support.

For families managing the financial logistics of international study, the choice of institution may also affect tuition payment workflows. Some universities with high adjunct reliance charge lower tuition for courses taught by part-time faculty, while others do not differentiate. For cross-border tuition payments, some international families use channels like Flywire tuition payment to settle fees, though this does not address the underlying faculty-quality question.

FAQ

Q1: Do any university rankings adjust for part-time faculty in their calculations?

Only U.S. News & World Report’s Best Colleges explicitly includes a “proportion of full-time faculty” metric, weighted at 1% of the total score. QS and THE do not distinguish between full-time and part-time instructors in any published sub-metric. The 2023 U.S. News methodology change reduced the weight of this factor from 2% to 1%, further marginalizing its impact.

Q2: How much of the U.S. higher education workforce is part-time?

According to the NCES Condition of Education 2024 report, 54% of all instructional staff at degree-granting institutions were part-time in fall 2022. At public community colleges, the figure was 67.3%. At private nonprofit four-year institutions, it was 42.1%. These proportions have remained stable since 2015.

Q3: What specific student outcomes are linked to high part-time faculty usage?

The National Student Clearinghouse Research Center (2023) found a 6.2 percentage-point lower first-year retention rate at institutions where more than 50% of introductory courses are taught by part-time faculty. The Community College Research Center (2023) documented a 12.4 percentage-point lower pass rate in introductory math and English courses when part-time faculty taught the majority of sections.

References

National Center for Education Statistics (NCES). 2024. Condition of Education 2024: Characteristics of Postsecondary Faculty. U.S. Department of Education.
American Association of University Professors (AAUP). 2022. Annual Report on the Economic Status of the Profession, 2021–22.
National Student Clearinghouse Research Center. 2023. Persistence & Retention Report: Fall 2022 Cohort.
Community College Research Center, Columbia University. 2023. Adjunct Faculty and Student Outcomes in Introductory Courses.
UNILINK Education. 2024. Institutional Faculty Composition Database. Internal data compilation.