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Academics

Entrance Exam

  • St. ThomasISEE (School code 571055; freshmen. Transfers: ISEE or PSAT.)
  • 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)

Recommendations

  • St. ThomasMath + English teachers (HAIS forms, after Dec 1); student statement + resume; report cards gr 6-8
  • 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

AP Courses

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

Dual Credit

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

World Languages

  • St. ThomasFrench · Spanish · Mandarin · Latin
  • 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

Honors Courses

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

Learning Support

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

Academic Model

  • St. ThomasNot Published
  • 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

AP Exams Scored 3+

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

Application Deadline

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

Family Interview

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

Language Credits Required

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

Notable Programs

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

Robotics

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

Test Score Deadline

  • St. ThomasNot Published
  • CathedralNot Published
  • St. Agnes2027-02-01
  • DuchesneNot Published
Commute from home
Tuition
$27,900

2026-27 rate

$22,850

2026-27 rate

$28,400

2026-27 rate

$33,600

2026-27 rate · Upper School

What's included
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
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
Sibling discount$2,000/yr per sibling after the firstNot PublishedNot PublishedNot Published
Lower school on campusHS onlyHS onlyHS only
Yes

PK3–12

Open houseDec 6, 2026Nov 7, 2026Not postedNov 1, 2026
Required test
ISEE

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

ISEE (or CLT for classical-school students)
ISEE

Offered on campus: Nov 14, 2026

ISEE
Application deadlineJan 15, 2027Jan 15, 2027Not postedNot posted
Decision dateMar 5, 2027Not postedNot postedNot posted
Financial aid
Need-based + Merit
Need-based + Merit
Need-based

No merit scholarships

Need-based + Merit
AP courses21Not posted2520
Enrollment791Not Published934300
Student:Teacher9:1Not Published9:18.1:1
Mass
Monthly
Daily
Weekly

Thursdays, 9:10 AM

Not Published
Sports12 sports11 sports12 sports12 sports
Links

“Not posted” means the school hasn’t published it yet for this admissions cycle — check each school’s full profile for sources.