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Academics

Entrance Exam

  • St. Catherine'sNone (No admission test. Inquiry → adults-only tour → director meeting → application ($150) + records + lesson samples → student classroom visit. 9th graders enter the Adolescent Community (gr 7-9); High School entry is gr 10-12.)
  • St. ThomasISEE (School code 571055; freshmen. Transfers: ISEE or PSAT.)
  • DuchesneISEE (Administered externally; campus tour + family interview also required)
  • 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.)

World Languages

  • St. Catherine'sSpanish · Latin/French/ASL/Portuguese via independent study & university partnerships
  • St. ThomasFrench · Spanish · Mandarin · Latin
  • DuchesneFrench (incl. Advanced IV-DELF B1) · Spanish (incl. AP) · American Sign Language I-III
  • CathedralLatin I-IV · Greek I-II · Modern language elective (Years 3-4)

Dual Credit

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

Recommendations

  • St. Catherine'sNot Published
  • 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
  • CathedralMath, English + Administrator (HAIS forms); transcripts 3 prior years; student essay

Academic Model

  • St. Catherine'sAMI-accredited Catholic Montessori adolescent program — four integrated areas (Theology, Integrated Humanities, Integrated Sciences, Mathematics); internships (Houston Methodist, law/design firms), university partnerships (St. Thomas, Texas A&M AgriLife), independent study; graduates build a "body of work" (No AP program; university partnerships and internships serve the advanced-work role.)
  • St. ThomasNot Published
  • DuchesneNot 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 Courses

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

Learning Support

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

Application Deadline

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

Family Interview

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

Honors Courses

  • St. Catherine'sNot Published
  • St. ThomasNot Published
  • Duchesne12 (Called "Advanced" courses)
  • CathedralNot Published

Notable Programs

  • St. Catherine'sNot Published
  • St. ThomasNot Published
  • DuchesneRobotics and competitive debate programs; IT internship with Microsoft certification; junior Research Paper requirement
  • CathedralNot Published
Commute from home
Tuition
$20,560

2026-27 rate · 9th grade; grades 10-12: $20,753

$27,900

2026-27 rate

$33,600

2026-27 rate · Upper School

$22,850

2026-27 rate

What's included
Fees listed separately see fees
  • Application fee: $150
  • Tuition deposit: $750
  • New Student Fee: $850
  • Facility fee: $800
  • Program fee: $2,500–$2,750
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

No itemized fees published.

Sibling discount10% off for each younger sibling$2,000/yr per sibling after the firstNot PublishedNot Published
Lower school on campus
Yes

14 months–12th (Montessori)

HS only
Yes

PK3–12

HS only
Open houseNot postedDec 6, 2026Nov 1, 2026Nov 7, 2026
Required test
None
ISEE

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

ISEE
ISEE (or CLT for classical-school students)
Application deadlineJan 15, 2027Jan 15, 2027Not postedJan 15, 2027
Decision dateMar 5, 2027Mar 5, 2027Not postedNot posted
Financial aid
Need-based
Need-based + Merit
Need-based + Merit
Need-based + Merit
AP coursesNot posted2120Not posted
Enrollment23791300Not Published
Student:Teacher14.4:19:18.1:1Not Published
Mass
Monthly
Monthly
Not Published
Daily
Sports6 sports12 sports12 sports11 sports
Links

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