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Academics

Entrance Exam

  • St. AgnesISEE (School code 443420; up to 2 scores; first attempt before Dec 1 (ERB rule))
  • 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.)
  • 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.)

AP Courses

  • St. Agnes25
  • St. Catherine'sNot Published
  • St. Thomas21 (40+ advanced/AP courses overall)
  • O'Connell3 (Confirmed via school event calendar: AP Calculus, AP Physics 1, AP Physics C. Not on an academics/curriculum page — count may be incomplete.)

World Languages

  • St. AgnesNot Published
  • St. Catherine'sSpanish · Latin/French/ASL/Portuguese via independent study & university partnerships
  • St. ThomasFrench · Spanish · Mandarin · Latin
  • O'ConnellSpanish I-III · German (IV dual credit) · American Sign Language I-III

Dual Credit

  • St. AgnesNot Published
  • St. Catherine'sNot Published
  • St. ThomasYes (4 dual-credit courses via University of St. Thomas)
  • O'ConnellYes (Via Galveston College: English III/IV, US History, Government, Spanish I/II, German IV (TSI test required))

Recommendations

  • St. AgnesEnglish + Math teachers (due Jan 14, 2027)
  • St. Catherine'sNot Published
  • St. ThomasMath + English teachers (HAIS forms, after Dec 1); student statement + resume; report cards gr 6-8
  • O'ConnellNot Published

Academic Model

  • St. AgnesNot 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.)
  • St. ThomasNot Published
  • O'ConnellNot Published

AP Exams Scored 3+

  • St. Agnes97 (% of AP exams scored 3+)
  • St. Catherine'sNot Published
  • St. ThomasNot Published
  • O'ConnellNot Published

Application Deadline

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

Honors Courses

  • St. Agnes12
  • St. Catherine'sNot Published
  • St. ThomasNot Published
  • O'ConnellNot Published

Language Credits Required

  • St. Agnes2
  • St. Catherine'sNot Published
  • St. ThomasNot Published
  • O'ConnellNot Published

Learning Support

  • St. AgnesNot Published
  • St. Catherine'sNot Published
  • St. ThomasLearning Enrichment Center; college counseling with 4-year plan
  • O'ConnellNot Published

Notable Programs

  • St. AgnesNot Published
  • St. Catherine'sNot Published
  • St. ThomasNot Published
  • O'ConnellSTEAM electives: Robotics, Computer Science, Esports, Horticulture, Graphic Design; Honors Engineering I & II; A La Carte program for homeschoolers

Robotics

  • St. AgnesSpectrum 3847 — 12 consecutive FIRST Championship appearances
  • St. Catherine'sNot Published
  • St. ThomasNot Published
  • O'ConnellNot Published

Test Score Deadline

  • St. Agnes2027-02-01
  • St. Catherine'sNot Published
  • St. ThomasNot Published
  • O'ConnellNot Published
Commute from home
Tuition
$28,400

2026-27 rate

$20,560

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

$27,900

2026-27 rate

$9,100

2025-26 rate (newest published)

What's included
Fees listed separately see fees
  • Application fee: $75 ($125 for transfer applicants)
  • Enrollment deposit: $500
  • Tablet PC (technology): $1,725
  • AP test fee: $105 (per AP / Honors-AP class) — optional
  • Senior fee: $350 (seniors only) — optional
  • Athletics fee: $150 (per sport) — 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
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
  • Registration fee: $450
  • Technology fee: $200
  • Sports fee: $150–$250 (per sport ($450 all-season package)) — optional
Sibling discountNot Published10% off for each younger sibling$2,000/yr per sibling after the firstMulti-student assistance available (amount not published)
Lower school on campusHS only
Yes

14 months–12th (Montessori)

HS onlyHS only
Open houseNot postedNot postedDec 6, 2026Not posted
Required test
ISEE

Offered on campus: Nov 14, 2026

None
ISEE

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

In-house placement test
Application deadlineNot postedJan 15, 2027Jan 15, 2027Not posted
Decision dateNot postedMar 5, 2027Mar 5, 2027Not posted
Financial aid
Need-based

No merit scholarships

Need-based
Need-based + Merit
Need-based + Merit
AP courses25Not posted213
Enrollment9342379180
Student:Teacher9:114.4:19:14.5:1
Mass
Weekly

Thursdays, 9:10 AM

Monthly
Monthly
Monthly
Sports12 sports6 sports12 sports13 sports
Links

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