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Academics

Entrance Exam

  • 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.)
  • 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.)

World Languages

  • 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)
  • St. ThomasFrench · Spanish · Mandarin · Latin
  • St. Catherine'sSpanish · Latin/French/ASL/Portuguese via independent study & university partnerships

Recommendations

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

AP Courses

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

Dual Credit

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

Academic Model

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

AP Program

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

Application Deadline

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

Honors Courses

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

Learning Support

  • DuchesneNot Published
  • St. John XXIIINot Published
  • St. ThomasLearning Enrichment Center; college counseling with 4-year plan
  • St. Catherine'sNot Published

Notable Programs

  • DuchesneRobotics and competitive debate programs; IT internship with Microsoft certification; junior Research Paper requirement
  • St. John XXIIINot Published
  • St. ThomasNot Published
  • St. Catherine'sNot Published
Commute from home
Tuition
$33,600

2026-27 rate · Upper School

$22,100

2026-27 rate

$27,900

2026-27 rate

$20,560

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

What's included
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
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
Sibling discountNot Published2nd student $17,680 ($4,420 off)$2,000/yr per sibling after the first10% off for each younger sibling
Lower school on campus
Yes

PK3–12

HS onlyHS only
Yes

14 months–12th (Montessori)

Open houseNov 1, 2026Not postedDec 6, 2026Not posted
Required test
ISEE
ISEE
ISEE

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

None
Application deadlineNot postedNot postedJan 15, 2027Jan 15, 2027
Decision dateNot postedNot postedMar 5, 2027Mar 5, 2027
Financial aid
Need-based + Merit
Need-based + Merit
Need-based + Merit
Need-based
AP courses20Not posted21Not posted
Enrollment30043279123
Student:Teacher8.1:111.3:19:114.4:1
MassNot Published
Weekly

Daily Mass also offered

Monthly
Monthly
Sports12 sports13 sports12 sports6 sports
Links

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