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Academics

Entrance Exam

  • St. ThomasISEE (School code 571055; freshmen. Transfers: ISEE or PSAT.)
  • 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.)
  • 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.)
  • DuchesneISEE (Administered externally; campus tour + family interview also required)

World Languages

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

Dual Credit

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

Recommendations

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

Academic Model

  • St. ThomasNot Published
  • 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.)
  • 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.)
  • DuchesneNot Published

AP Courses

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

Learning Support

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

Application Deadline

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

Family Interview

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

Honors Courses

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

Notable Programs

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

2026-27 rate

$20,560

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

$22,850

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

No itemized fees published.

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 first10% off for each younger siblingNot PublishedNot Published
Lower school on campusHS only
Yes

14 months–12th (Montessori)

HS only
Yes

PK3–12

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

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

None
ISEE (or CLT for classical-school students)
ISEE
Application deadlineJan 15, 2027Jan 15, 2027Jan 15, 2027Not posted
Decision dateMar 5, 2027Mar 5, 2027Not postedNot posted
Financial aid
Need-based + Merit
Need-based
Need-based + Merit
Need-based + Merit
AP courses21Not postedNot posted20
Enrollment79123Not Published300
Student:Teacher9:114.4:1Not Published8.1:1
Mass
Monthly
Monthly
Daily
Not Published
Sports12 sports6 sports11 sports12 sports
Links

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