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Academics

Entrance Exam

  • CathedralISEE (or CLT for classical-school students) (Scores due Jan 30, 2027. Application opens first week of Sept 2026, due Jan 15, 2027. A family interview is required (parents + student); a shadow day can be requested at the interview.)
  • St. AgnesISEE (School code 443420; up to 2 scores; first attempt before Dec 1 (ERB rule))
  • DuchesneISEE (Administered externally; campus tour + family interview also required)
  • St. ThomasISEE (School code 571055; freshmen. Transfers: ISEE or PSAT.)

Recommendations

  • CathedralMath, English + Administrator (HAIS forms); transcripts 3 prior years; student essay
  • St. AgnesEnglish + Math teachers (due Jan 14, 2027)
  • DuchesneEnglish and/or Math teacher + principal/head of school; 2 years transcripts
  • St. ThomasMath + English teachers (HAIS forms, after Dec 1); student statement + resume; report cards gr 6-8

AP Courses

  • CathedralNot Published
  • St. Agnes25
  • Duchesne20 (AP enrollment caps: soph 1 / jr 2 / sr 3; AP exam required if enrolled)
  • St. Thomas21 (40+ advanced/AP courses overall)

Dual Credit

  • CathedralYes (University of St. Thomas partnership (est. June 2023))
  • St. AgnesNot Published
  • DuchesneYes (University of St. Thomas partnership; online electives via SophieConnect + One Schoolhouse)
  • St. ThomasYes (4 dual-credit courses via University of St. Thomas)

World Languages

  • CathedralLatin I-IV · Greek I-II · Modern language elective (Years 3-4)
  • St. AgnesNot Published
  • DuchesneFrench (incl. Advanced IV-DELF B1) · Spanish (incl. AP) · American Sign Language I-III
  • St. ThomasFrench · Spanish · Mandarin · Latin

Honors Courses

  • CathedralNot Published
  • St. Agnes12
  • Duchesne12 (Called "Advanced" courses)
  • St. ThomasNot Published

Learning Support

  • CathedralLearning Enrichment Center — an individual learning plan for every student; tutoring, accommodations and testing support
  • St. AgnesNot Published
  • DuchesneNot Published
  • St. ThomasLearning Enrichment Center; college counseling with 4-year plan

Academic Model

  • CathedralClassical liberal arts — Trivium (Grammar/Logic/Rhetoric), Shakespeare every year, Junior Thesis, Senior Seminar + Senior Rome Trip. Four Pillars: Sacred Worship, Wisdom, Music, Art. (No AP courses are advertised; dual credit serves the advanced-coursework role.)
  • St. AgnesNot Published
  • DuchesneNot Published
  • St. ThomasNot Published

AP Exams Scored 3+

  • CathedralNot Published
  • St. Agnes97 (% of AP exams scored 3+)
  • DuchesneNot Published
  • St. ThomasNot Published

Application Deadline

  • CathedralNot Published
  • St. AgnesNot Published
  • DuchesneNot Published
  • St. Thomas2027-01-15 (Opens Aug 3, 2026; supporting docs due Jan 31; rolling after)

Family Interview

  • CathedralYes (Family interview at the school — parents and student)
  • St. AgnesNot Published
  • DuchesneNot Published
  • St. ThomasNot Published

Language Credits Required

  • CathedralNot Published
  • St. Agnes2
  • DuchesneNot Published
  • St. ThomasNot Published

Notable Programs

  • CathedralNot Published
  • St. AgnesNot Published
  • DuchesneRobotics and competitive debate programs; IT internship with Microsoft certification; junior Research Paper requirement
  • St. ThomasNot Published

Robotics

  • CathedralNot Published
  • St. AgnesSpectrum 3847 — 12 consecutive FIRST Championship appearances
  • DuchesneNot Published
  • St. ThomasNot Published

Test Score Deadline

  • CathedralNot Published
  • St. Agnes2027-02-01
  • DuchesneNot Published
  • St. ThomasNot Published
Commute from home
Tuition
$22,850

2026-27 rate

$28,400

2026-27 rate

$33,600

2026-27 rate · Upper School

$27,900

2026-27 rate

What's included
Fees listed separately

No itemized fees published.

Fees listed separately see fees
  • Application fee: $75 ($125 for transfer applicants)
  • Enrollment deposit: $500
  • Tablet PC (technology): $1,725
  • AP test fee: $105 (per AP / Honors-AP class) — optional
  • Senior fee: $350 (seniors only) — optional
  • Athletics fee: $150 (per sport) — optional
Fees listed separately see fees
  • New Student Fee: $1,500
  • Enrollment deposit: $1,000
  • Technology fee (Grade 9): $2,600
  • Textbooks: $350 (approximate, Upper School)
  • Grade 10 College Tour: $500 (grade 10)
  • Graduation fee: $600 (seniors)
  • Class trips: $175–$2,800 — optional
  • AP exams: $100–$200 (per exam) — optional
  • Athletics fee: $150–$300 (per sport) — optional
Included in tuition see list
  • Laptop & technology

Charged separately:

  • Application fee: $75
  • Registration fee: $700
  • Camp Aquinas (freshman retreat): $650 (freshmen)
  • Class retreat: $325 (returning/transfer students)
  • Books: $550
  • Athletics fee: $250 (per sport) — optional
  • AP exam: $99 (per course) — optional
Sibling discountNot PublishedNot PublishedNot Published$2,000/yr per sibling after the first
Lower school on campusHS onlyHS only
Yes

PK3–12

HS only
Open houseNov 7, 2026Not postedNov 1, 2026Dec 6, 2026
Required test
ISEE (or CLT for classical-school students)
ISEE

Offered on campus: Nov 14, 2026

ISEE
ISEE

Offered on campus: Nov 14, 2026 · Jan 9, 2027

Application deadlineJan 15, 2027Not postedNot postedJan 15, 2027
Decision dateNot postedNot postedNot postedMar 5, 2027
Financial aid
Need-based + Merit
Need-based

No merit scholarships

Need-based + Merit
Need-based + Merit
AP coursesNot posted252021
EnrollmentNot Published934300791
Student:TeacherNot Published9:18.1:19:1
Mass
Daily
Weekly

Thursdays, 9:10 AM

Not Published
Monthly
Sports11 sports12 sports12 sports12 sports
Links

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