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

World Languages

  • St. Catherine'sSpanish · Latin/French/ASL/Portuguese via independent study & university partnerships
  • St. John XXIIISpanish (confirmed via Spanish NHS; full list not published)
  • DuchesneFrench (incl. Advanced IV-DELF B1) · Spanish (incl. AP) · American Sign Language I-III
  • St. ThomasFrench · Spanish · Mandarin · Latin

Recommendations

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

AP Courses

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

Dual Credit

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

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

AP Program

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

Application Deadline

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

Honors Courses

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

Learning Support

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

Notable Programs

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

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

$22,100

2026-27 rate

$33,600

2026-27 rate · Upper School

$27,900

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
Fees listed separately see fees
  • New Student Enrollment Fee: $500
  • Financial aid application (Clarity): $60 — 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
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
Sibling discount10% off for each younger sibling2nd student $17,680 ($4,420 off)Not Published$2,000/yr per sibling after the first
Lower school on campus
Yes

14 months–12th (Montessori)

HS only
Yes

PK3–12

HS only
Open houseNot postedNot postedNov 1, 2026Dec 6, 2026
Required test
None
ISEE
ISEE
ISEE

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

Application deadlineJan 15, 2027Not postedNot postedJan 15, 2027
Decision dateMar 5, 2027Not postedNot postedMar 5, 2027
Financial aid
Need-based
Need-based + Merit
Need-based + Merit
Need-based + Merit
AP coursesNot postedNot posted2021
Enrollment23432300791
Student:Teacher14.4:111.3:18.1:19:1
Mass
Monthly
Weekly

Daily Mass also offered

Not Published
Monthly
Sports6 sports13 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.