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Academics

Entrance Exam

  • St. ThomasISEE (School code 571055; freshmen. Transfers: ISEE or PSAT.)
  • DuchesneISEE (Administered externally; campus tour + family interview also required)
  • St. John XXIIIISEE (School code 570048; 9th grade. 11th/12th transfers submit PSAT. Last cycle: opened Sept 1, deadline Jan 15, docs Jan 31, rolling after.)
  • 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.)

Recommendations

  • St. ThomasMath + English teachers (HAIS forms, after Dec 1); student statement + resume; report cards gr 6-8
  • DuchesneEnglish and/or Math teacher + principal/head of school; 2 years transcripts
  • St. John XXIIITeacher recommendations (school forms) + official transcripts; interviews for transfers only
  • CathedralMath, English + Administrator (HAIS forms); transcripts 3 prior years; student essay

World Languages

  • St. ThomasFrench · Spanish · Mandarin · Latin
  • DuchesneFrench (incl. Advanced IV-DELF B1) · Spanish (incl. AP) · American Sign Language I-III
  • St. John XXIIISpanish (confirmed via Spanish NHS; full list not published)
  • CathedralLatin I-IV · Greek I-II · Modern language elective (Years 3-4)

Dual Credit

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

AP Courses

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

Learning Support

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

Academic Model

  • St. ThomasNot Published
  • DuchesneNot Published
  • St. John XXIIINot 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.)

AP Program

  • St. ThomasNot Published
  • DuchesneNot Published
  • St. John XXIIIAP and honors coursework offered (count not published; Course Selection Guide not public)
  • CathedralNot Published

Application Deadline

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

Family Interview

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

Honors Courses

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

Notable Programs

  • St. ThomasNot Published
  • DuchesneRobotics and competitive debate programs; IT internship with Microsoft certification; junior Research Paper requirement
  • St. John XXIIINot Published
  • CathedralNot Published
Commute from home
Tuition
$27,900

2026-27 rate

$33,600

2026-27 rate · Upper School

$22,100

2026-27 rate

$22,850

2026-27 rate

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 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
Fees listed separately see fees
  • New Student Enrollment Fee: $500
  • Financial aid application (Clarity): $60 — optional
Fees listed separately

No itemized fees published.

Sibling discount$2,000/yr per sibling after the firstNot Published2nd student $17,680 ($4,420 off)Not Published
Lower school on campusHS only
Yes

PK3–12

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

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

ISEE
ISEE
ISEE (or CLT for classical-school students)
Application deadlineJan 15, 2027Not postedNot postedJan 15, 2027
Decision dateMar 5, 2027Not postedNot postedNot posted
Financial aid
Need-based + Merit
Need-based + Merit
Need-based + Merit
Need-based + Merit
AP courses2120Not postedNot posted
Enrollment791300432Not Published
Student:Teacher9:18.1:111.3:1Not Published
Mass
Monthly
Not Published
Weekly

Daily Mass also offered

Daily
Sports12 sports12 sports13 sports11 sports
Links

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