Breaking or Building Tracks?

Community College Mathematics Access and Calculus Success

Michael Bostick

Central Wyoming College / University of Wyoming

Miriam Sanders

University of Wyoming

Mark Perkins

UC Colorado Springs / University of Wyoming

Scott Chamberlin

University of Wyoming

April 8, 2026

Are community college math pathways breaking tracks — or just building new ones?

Scan QR code for slides.

The Equity Stakes

  • Calculus is a gateway — and a barrier — to STEM degrees (Redmond-Sanogo et al., 2016).

  • Half of all undergraduates attend community colleges (CCs), but are less likely to earn STEM degrees (Bahr et al., 2023; Zhang, 2022).

  • CCs have reformed math pathways: corequisite courses, concurrent/dual enrollment, and moves toward holistic placement.

  • But we lack evidence on whether these reforms predict calculus success — especially for students who are underrepresented racially minoritized (URM) (Bahr et al., 2017; Burn et al., 2015).

Research Questions

RQ1 — Preparation, Placement, & Pathways

To what extent does HS GPA and ACT Math predict calculus success, and how are these moderated by time since high school or concurrent enrollment?

RQ2 — Student Characteristics & Learning Contexts

To what extent do demographics and prior math coursework predict success, and how are these moderated by corequisite course availability or section mean HS GPA?

Note. HS GPA = high school grade point average, ACT Math = ACT Math Score, concurrent enrollment = did students take a concurrent enrollment prerequisite prior to CC calculus, demographics are biological sex and URM, prior math coursework is the number of CC math courses prior to calculus.

Data & Method

  • Theoretical Framework - Academic momentum conceptualizes continued academic achievement as a result of past course taking behaviors and academic achievements (Adelman, 2006). This framework has been extended to momentum for CC student success (Wang, 2017) and STEM academic momentum (Wang, 2015; Zhang, 2022)
  • Multilevel Logistic Regression - students (level 1) nested within course sections (level 2) (McCoach & Cintron, 2021; Raudenbush & Bryk, 2001).
  • Wyoming CC System - 5 of 7 colleges, years 2013-2023.
  • Analytical Sample - \(n=745\) students in \(k=91\) sections (after exclusions)
  • Outcome Variable - Binary, Pass (A,B,C,S) / Fail (D,F,U) in Calculus I.
  • 13 Predictors - 7 student-level, 2 student-level interactions, 2 section-level, 2 cross-level interactions

Multilevel Logistic Regression Model (RQ1)

RQ1 — Preparation & Pathways

To what extent does HS GPA and ACT Math predict calculus success, and how are these moderated by time since high school or concurrent enrollment?

Model Variables
Effect Parameter Level
Intercept and Random Effect \(\gamma_{00}+u_{0j}\) --
HSGPA (gmc) \(\color{gray}{\gamma_{01}}\) Section
Coreq College \(\color{gray}{\gamma_{02}}\) Section
HSGPA (cwc) \(\mathbf{\gamma_{10}}\) Student
ACT Math (cwc) \(\mathbf{\gamma_{20}}\) Student
Years Since HS (cwc) \(\mathbf{\gamma_{30}}\) Student
Math Courses (cwc) \(\color{gray}{\gamma_{40}}\) Student
Math Courses (cwc) × Coreq College \(\color{gray}{\gamma_{41}}\) Cross-Level
Female \(\color{gray}{\gamma_{50}}\) Student
Concurrent Prereq (cwc) \(\mathbf{\gamma_{60}}\) Student
URM \(\color{gray}{\gamma_{70}}\) Student
URM × HSGPA (gmc) \(\color{gray}{\gamma_{71}}\) Cross-Level
HSGPA (cwc) × Years Since HS (cwc) \(\mathbf{\gamma_{80}}\) Student
Concurrent Prereq (cwc) × ACT Math (cwc) \(\mathbf{\gamma_{90}}\) Student

Note. The intercept \(\gamma_{00}\) represents the grand mean log-odds of passing, and the random effect \(u_{0j}\) captures section-specific deviations from this grand mean. \(\gamma\) coefficients represent the expected change in log-odds of passing CC calculus for a (unit) change in the variable. Level 1 = student, level 2 = section. Grand mean centered = gmc, centered within sections = cwc. Bold coefficients address RQ1.

RQ1 Result: HS GPA Beats ACT Math — But Time Erodes It

  • HS GPA was the strongest predictor of success \((\gamma_{10}=1.608, p<0.001)\).
    • A +1 SD increase in HS GPA → 87% increase in odds of passing.
  • The benefit of HS GPA fades with years out of high school \((\gamma_{80}=-0.798, p<0.001)\).
    • Students 2+ years past HS received no predicted benefit from their HS GPA.
  • ACT Math was not a statistically significant predictor alone.

Wyoming CCs use ACT Math for placement; only 2 use HS GPA. This is backwards.

Note. Predicted probability of passing calculus across HS GPA (cwc) ± 2 SD, by years since HS (cwc) ± 2 SD. All other variables held at mean.

RQ1 Result: Concurrent Enrollment Amplifies ACT Math

  • ACT Math and concurrent enrollment prerequisite were not individually statistically significant.
  • Their interaction was \((\gamma_{90}=0.203, p<0.05)\): students who took concurrent enrollment got a boost from higher ACT scores.
    • +1 SD concurrent enrollment & +1 SD ACT Math → 44% increase in odds of passing.
  • Students with average or below-average ACT received little benefit from concurrent enrollment.

Concurrent enrollment reinforces advantages for students who were already academically stronger.

Note. Predicted probability of passing calculus across ACT Math (cwc) ± 2 SD, by concurrent enrollment prereq (cwc) ± 2 SD. All other variables held at mean.

Multilevel Logistic Regression Model (RQ2)

RQ2 — Student Characteristics & Learning Contexts

To what extent do demographics and prior math coursework predict success, and how are these moderated by corequisite course availability or section mean HS GPA?

Model Variables
Effect Parameter Level
Intercept and Random Effect \(\gamma_{00}+u_{0j}\) --
HSGPA (gmc) \(\mathbf{\gamma_{01}}\) Section
Coreq College \(\mathbf{\gamma_{02}}\) Section
HSGPA (cwc) \(\color{gray}{\gamma_{10}}\) Student
ACT Math (cwc) \(\color{gray}{\gamma_{20}}\) Student
Years Since HS (cwc) \(\color{gray}{\gamma_{30}}\) Student
Math Courses (cwc) \(\mathbf{\gamma_{40}}\) Student
Math Courses (cwc) × Coreq College \(\mathbf{\gamma_{41}}\) Cross-Level
Female \(\mathbf{\gamma_{50}}\) Student
Concurrent Prereq (cwc) \(\color{gray}{\gamma_{60}}\) Student
URM \(\mathbf{\gamma_{70}}\) Student
URM × HSGPA (gmc) \(\mathbf{\gamma_{71}}\) Cross-Level
HSGPA (cwc) × Years Since HS (cwc) \(\color{gray}{\gamma_{80}}\) Student
Concurrent Prereq (cwc) × ACT Math (cwc) \(\color{gray}{\gamma_{90}}\) Student

Note. The intercept \(\gamma_{00}\) represents the grand mean log-odds of passing, and the random effect \(u_{0j}\) captures section-specific deviations from this grand mean. \(\gamma\) coefficients represent the expected change in log-odds of passing CC calculus for a (unit) change in the variable. Level 1 = student, level 2 = section. Grand mean centered = gmc, centered within sections = cwc. Bold coefficients address RQ2.

RQ2 Result: More Prerequisites Help — Unless Corequisites Exist

  • More math prerequisite courses was a statistically significant positive predictor \((\gamma_{40}=0.305, p<0.05)\).
    • Each additional prerequisite course → 36% increase in odds of passing.
  • Corequisite availability negated this effect \((\gamma_{41}=-0.552, p<0.01)\).
    • At colleges with corequisites available, the benefit of prerequisites was reduced by 42%.
  • Corequisite availability alone was not statistically significant.

Where corequisites exist, the long prerequisite track doesn’t build momentum.

Note. Predicted probability of passing calculus across math prerequisites (cwc) ± 2 SD, by corequisite availability. All other variables held at mean.

RQ2 Result: Section GPA Helps Everyone — Except URM Students

  • Section mean HS GPA was a strong positive predictor of success \((\gamma_{01}=2.912, p<0.001)\).
    • +1 SD section GPA (0.19 GPA pts) → 75% increase in odds of passing.
  • The cross-level interaction Section GPA × URM was a strong negative predictor \((\gamma_{71}=-2.734, p<0.05)\).
    • For URM, the benefit of being in a high-GPA section was reduced by 94%.
    • URM alone was not statistically significant.

URM students do not share in the peer composition advantage that benefits everyone else.

Note. Predicted probability of passing calculus across section mean HS GPA (gmc) ± 2 SD, by URM status. All other variables held at mean.

Discussion

For Placement Policy

For Pathway Design

For Section-Level Equity

So: Breaking Tracks or Building New Ones?

Key Predictors Results Implications
HS GPA, years since HS HS GPA superior to ACT Math, but fades with time. HS GPA or multiple measures best predictors but not widely used
ACT Math, Concurrent enrollment Concurrent enrollment amplifies ACT advantage Concurrent enrollment not improving equity
Math prerequisites, corequisite availability Corequisite availability negates long-sequence benefit Corequisite courses can replace excessive math prerequisites
Section mean HS GPA, URM Section GPA strong peer effect — but not for URM students Equity concerns for students who are URM in calculus

The reforms are real, but the tracking logic persists — inequitable placement policies and who benefits from peer composition and concurrent enrollment.

Limitations & Future Directions

  • Data: Administrative records — no direct measures of placement processes, student aspirations, or instructional quality.
  • Sample: Rural Wyoming CC system — generalizability is limited. Much missing data.
  • Unmeasured factors: Students’ secondary mathematics history, socioeconomic context, geospatial access (Sonnert et al., 2016).
  • Future work: Qualitative investigation of URM student experience in calculus sections, study of corequisite implementation fidelity (Stone-Johnstone, 2023), research Wyoming dual/concurrent enrollment calculus students (Corin et al., 2020), and equity in dual enrollment course access (Xu et al., 2021) .

Thank You

Reforming the Math Hierarchy: Policy, Practice, and the Politics of Equity in Access and Pathways. AERA 2026.

Breaking or Building Tracks? Community College Mathematics Access and Calculus Success

Michael Bostick | bostickmike@gmail.com | Central Wyoming College

Full model results, diagnostics, and summary statistics:

Multilevel Logistic Regression Model Dashboard

References

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