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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. AgnesISEE (School code 443420; up to 2 scores; first attempt before Dec 1 (ERB rule))
  • 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.)
  • DuchesneISEE (Administered externally; campus tour + family interview also required)

World Languages

  • St. Catherine'sSpanish · Latin/French/ASL/Portuguese via independent study & university partnerships
  • St. AgnesNot Published
  • O'ConnellSpanish I-III · German (IV dual credit) · American Sign Language I-III
  • DuchesneFrench (incl. Advanced IV-DELF B1) · Spanish (incl. AP) · American Sign Language I-III

AP Courses

  • St. Catherine'sNot Published
  • St. Agnes25
  • O'ConnellNot Published
  • Duchesne20 (AP enrollment caps: soph 1 / jr 2 / sr 3; AP exam required if enrolled)

Dual Credit

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

Honors Courses

  • St. Catherine'sNot Published
  • St. Agnes12
  • O'ConnellNot Published
  • Duchesne12 (Called "Advanced" courses)

Notable Programs

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

Recommendations

  • St. Catherine'sNot Published
  • St. AgnesEnglish + Math teachers (due Jan 14, 2027)
  • O'ConnellNot Published
  • DuchesneEnglish and/or Math teacher + principal/head of school; 2 years transcripts

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. AgnesNot Published
  • O'ConnellNot Published
  • DuchesneNot Published

AP Exams Scored 3+

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

Language Credits Required

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

Robotics

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

Test Score Deadline

  • St. Catherine'sNot Published
  • St. Agnes2027-02-01
  • O'ConnellNot Published
  • DuchesneNot Published
Commute from home
Tuition
$20,560

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

$28,400

2026-27 rate

$9,100

2025-26 rate (newest published)

$33,600

2026-27 rate · Upper School

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
  • 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
  • Registration fee: $450
  • Technology fee: $200
  • Sports fee: $150–$250 (per sport ($450 all-season package)) — 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
Sibling discount10% off for each younger siblingNot PublishedMulti-student assistance available (amount not published)Not Published
Lower school on campus
Yes

14 months–12th (Montessori)

HS onlyHS only
Yes

PK3–12

Open houseNot postedNot postedNot postedNov 1, 2026
Required test
None
ISEE

Offered on campus: Nov 14, 2026

In-house placement test
ISEE
Application deadlineJan 15, 2027Not postedNot postedNot posted
Decision dateMar 5, 2027Not postedNot postedNot posted
Financial aid
Need-based
Need-based

No merit scholarships

Need-based + Merit
Need-based + Merit
AP coursesNot posted25Not posted20
Enrollment2393480300
Student:Teacher14.4:19:14.5:18.1:1
Mass
Monthly
Weekly

Thursdays, 9:10 AM

Monthly
Not Published
Sports6 sports12 sports13 sports12 sports
Links

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