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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. 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)
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.)

World Languages

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
St. ThomasFrench · Spanish · Mandarin · Latin
O'ConnellSpanish I-III · German (IV dual credit) · American Sign Language I-III

Dual Credit

St. Catherine'sNot Published
DuchesneYes (University of St. Thomas partnership; online electives via SophieConnect + One Schoolhouse)
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))

AP Courses

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

Notable Programs

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

Recommendations

St. Catherine'sNot Published
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
O'ConnellNot Published

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.)
DuchesneNot Published
St. ThomasNot Published
O'ConnellNot Published

Application Deadline

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

Honors Courses

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

Learning Support

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

Commute from home

	St. Catherine's Montessori	Duchesne Academy of the Sacred Heart	St. Thomas High School	O'Connell College Preparatory School
Tuition	$20,560 2026-27 rate · 9th grade; grades 10-12: $20,753	$33,600 2026-27 rate · Upper School	$27,900 2026-27 rate	$9,100 2025-26 rate (newest published)
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 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	Fees listed separately see fees Registration fee: $450 Technology fee: $200 Sports fee: $150–$250 (per sport ($450 all-season package)) — optional
Sibling discount	10% off for each younger sibling	Not Published	$2,000/yr per sibling after the first	Multi-student assistance available (amount not published)
Lower school on campus	Yes 14 months–12th (Montessori)	Yes PK3–12	HS only	HS only
Open house	Not posted	Nov 1, 2026	Dec 6, 2026	Not posted
Required test	None	ISEE	ISEE Offered on campus: Nov 14, 2026 · Jan 9, 2027	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	Need-based + Merit	Need-based + Merit	Need-based + Merit
AP courses	Not posted	20	21	Not posted
Enrollment	23	300	791	80
Student:Teacher	14.4:1	8.1:1	9:1	4.5:1
Mass	Monthly	Not Published	Monthly	Monthly
Sports	6 sports	12 sports	12 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.