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Academics

Entrance Exam

  • 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. 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.)
  • DuchesneISEE (Administered externally; campus tour + family interview also required)
  • O'ConnellIn-house placement test (No ISEE/HSPT — 30-60 min Math & Reading placement test, offered Mon-Thu 8:30-2:30. Rolling admissions, no published deadlines.)

World Languages

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

Dual Credit

  • St. John XXIIINot Published
  • St. Catherine'sNot Published
  • DuchesneYes (University of St. Thomas partnership; online electives via SophieConnect + One Schoolhouse)
  • O'ConnellYes (Via Galveston College: English III/IV, US History, Government, Spanish I/II, German IV (TSI test required))

Notable Programs

  • St. John XXIIINot Published
  • St. Catherine'sNot Published
  • DuchesneRobotics and competitive debate programs; IT internship with Microsoft certification; junior Research Paper requirement
  • O'ConnellSTEAM electives: Robotics, Computer Science, Esports, Horticulture, Graphic Design; Honors Engineering I & II; A La Carte program for homeschoolers

Recommendations

  • St. John XXIIITeacher recommendations (school forms) + official transcripts; interviews for transfers only
  • St. Catherine'sNot Published
  • DuchesneEnglish and/or Math teacher + principal/head of school; 2 years transcripts
  • O'ConnellNot Published

Academic Model

  • St. John XXIIINot 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.)
  • DuchesneNot Published
  • O'ConnellNot Published

AP Courses

  • St. John XXIIINot Published
  • St. Catherine'sNot Published
  • Duchesne20 (AP enrollment caps: soph 1 / jr 2 / sr 3; AP exam required if enrolled)
  • O'ConnellNot Published

AP Program

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

Honors Courses

  • St. John XXIIINot Published
  • St. Catherine'sNot Published
  • Duchesne12 (Called "Advanced" courses)
  • O'ConnellNot Published
Commute from home
Tuition
$22,100

2026-27 rate

$20,560

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

$33,600

2026-27 rate · Upper School

$9,100

2025-26 rate (newest published)

What's included
Fees listed separately see fees
  • New Student Enrollment Fee: $500
  • Financial aid application (Clarity): $60 — 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 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
  • Registration fee: $450
  • Technology fee: $200
  • Sports fee: $150–$250 (per sport ($450 all-season package)) — optional
Sibling discount2nd student $17,680 ($4,420 off)10% off for each younger siblingNot PublishedMulti-student assistance available (amount not published)
Lower school on campusHS only
Yes

14 months–12th (Montessori)

Yes

PK3–12

HS only
Open houseNot postedNot postedNov 1, 2026Not posted
Required test
ISEE
None
ISEE
In-house placement test
Application deadlineNot postedJan 15, 2027Not postedNot posted
Decision dateNot postedMar 5, 2027Not postedNot posted
Financial aid
Need-based + Merit
Need-based
Need-based + Merit
Need-based + Merit
AP coursesNot postedNot posted20Not posted
Enrollment4322330080
Student:Teacher11.3:114.4:18.1:14.5:1
Mass
Weekly

Daily Mass also offered

Monthly
Not Published
Monthly
Sports13 sports6 sports12 sports13 sports
Links

“Not posted” means the school hasn’t published it yet for this admissions cycle — check each school’s full profile for sources.