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Cathedral Cristo Rey Duchesne Frassati Incarnate Word O'Connell St. Agnes St. Catherine's St. John XXIII St. Peter CTHS St. Pius X St. Thomas Strake Jesuit

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Academics College Counseling Athletics Faith & Service Student Life Arts Daily Life Student Support College Outcomes Cost & Financial Aid

Academics

Entrance Exam

St. ThomasISEE (School code 571055; freshmen. Transfers: ISEE or PSAT.)
St. Pius XISEE (School code 571082; 9th-grade applicants. Transfers submit PSAT/SAT/ACT. School offers an ISEE prep course. Application opens Sept 1.)
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.)
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.)

Dual Credit

St. ThomasYes (4 dual-credit courses via University of St. Thomas)
St. Pius XYes (Via college partnerships (institutions not named))
St. Catherine'sNot Published
O'ConnellYes (Via Galveston College: English III/IV, US History, Government, Spanish I/II, German IV (TSI test required))

World Languages

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

Learning Support

St. ThomasLearning Enrichment Center; college counseling with 4-year plan
St. Pius XPaul A. Gilliam '98 Learning for Success program — structured academic support ($2,500/yr)
St. Catherine'sNot Published
O'ConnellNot Published

Notable Programs

St. ThomasNot Published
St. Pius X"Engineer Your World I & II," Computer Science; electives in Business, Law, Psychology, Media Arts
St. Catherine'sNot Published
O'ConnellSTEAM electives: Robotics, Computer Science, Esports, Horticulture, Graphic Design; Honors Engineering I & II; A La Carte program for homeschoolers

Recommendations

St. ThomasMath + English teachers (HAIS forms, after Dec 1); student statement + resume; report cards gr 6-8
St. Pius XMath + English teachers, Principal/Counselor; student essay; transcripts
St. Catherine'sNot Published
O'ConnellNot Published

Academic Model

St. ThomasNot Published
St. Pius XNot 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.)
O'ConnellNot Published

AP Courses

St. Thomas21 (40+ advanced/AP courses overall)
St. Pius XNot Published
St. Catherine'sNot Published
O'ConnellNot Published

Application Deadline

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

Honors & AP Courses

St. ThomasNot Published
St. Pius X25 (Honors/AP combined; 490 AP exams, 49 AP Scholars in 2025)
St. Catherine'sNot Published
O'ConnellNot Published

Commute from home

	St. Thomas High School	St. Pius X High School	St. Catherine's Montessori	O'Connell College Preparatory School
Tuition	$27,900 2026-27 rate	$22,850 2026-27 rate	$20,560 2026-27 rate · 9th grade; grades 10-12: $20,753	$9,100 2025-26 rate (newest published)
What's included	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 (new students): $350 Graduation fee (seniors): $280 (seniors) Athletics fee: $150–$350 (per sport) — optional Learning for Success program: $2,500 (if enrolled in program) — optional Bus transportation: $1,550 — 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 Registration fee: $450 Technology fee: $200 Sports fee: $150–$250 (per sport ($450 all-season package)) — optional
Sibling discount	$2,000/yr per sibling after the first	Half tuition for a 3rd concurrently enrolled child	10% off for each younger sibling	Multi-student assistance available (amount not published)
Lower school on campus	HS only	HS only	Yes 14 months–12th (Montessori)	HS only
Open house	Dec 6, 2026	Not posted	Not posted	Not posted
Required test	ISEE Offered on campus: Nov 14, 2026 · Jan 9, 2027	ISEE	None	In-house placement test
Application deadline	Jan 15, 2027	Not posted	Jan 15, 2027	Not posted
Decision date	Mar 5, 2027	Not posted	Mar 5, 2027	Not posted
Financial aid	Need-based + Merit	Need-based + Merit	Need-based	Need-based + Merit
AP courses	21	Not posted	Not posted	Not posted
Enrollment	791	655	23	80
Student:Teacher	9:1	7:1	14.4:1	4.5:1
Mass	Monthly	Monthly	Monthly	Monthly
Sports	12 sports	14 sports	6 sports	13 sports
Links	Full profile Admissions	Full profile Admissions	Full profile Admissions	Full profile Admissions

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