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Dual Credit

CathedralYes (University of St. Thomas partnership (est. June 2023))
Incarnate WordYes (4 courses with Lone Star College)
O'ConnellYes (Via Galveston College: English III/IV, US History, Government, Spanish I/II, German IV (TSI test required))

Entrance Exam

CathedralISEE (or CLT for classical-school students) (Scores due Jan 30, 2027. Application opens first week of Sept 2026, due Jan 15, 2027. A family interview is required (parents + student); a shadow day can be requested at the interview.)
Incarnate WordISEE (School code 570451; up to two scores. Application opens Aug 17, 2026.)
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.)

Notable Programs

CathedralNot Published
Incarnate WordYoung Leaders Program; 5 endorsements; STEM emphasis
O'ConnellSTEAM electives: Robotics, Computer Science, Esports, Horticulture, Graphic Design; Honors Engineering I & II; A La Carte program for homeschoolers

Recommendations

CathedralMath, English + Administrator (HAIS forms); transcripts 3 prior years; student essay
Incarnate WordMath + English teachers (HAIS forms); transcripts 6th, 7th, 1st-sem 8th
O'ConnellNot Published

World Languages

Academic Model

CathedralClassical liberal arts — Trivium (Grammar/Logic/Rhetoric), Shakespeare every year, Junior Thesis, Senior Seminar + Senior Rome Trip. Four Pillars: Sacred Worship, Wisdom, Music, Art. (No AP courses are advertised; dual credit serves the advanced-coursework role.)
Incarnate WordNot Published
O'ConnellNot Published

AP Courses

CathedralNot Published
Incarnate Word18 (Academics page says 18, FAQ says 19; AP Honor Roll Platinum; >75% of AP testers score 3-5)
O'ConnellNot Published

Application Deadline

CathedralNot Published
Incarnate Word2026-12-14 (Earliest deadline of the Houston Catholic schools; supplemental materials Jan 29, 2027)
O'ConnellNot Published

Family Interview

Learning Support

CathedralLearning Enrichment Center — an individual learning plan for every student; tutoring, accommodations and testing support
Incarnate WordNot Published
O'ConnellNot Published

Commute from home

	Cathedral High School	Incarnate Word Academy	O'Connell College Preparatory School
Tuition	$22,850 2026-27 rate	$22,800 2026-27 rate	$9,100 2025-26 rate (newest published)
What's included	Fees listed separately No itemized fees published.	Fees listed separately see fees Application fee: $75 Registration fee: $350 Tuition deposit: $500 Freshman fee (orientation camp): $350 (freshmen) Senior fee (graduation + retreat): $300 (seniors) Books: —	Fees listed separately see fees Registration fee: $450 Technology fee: $200 Sports fee: $150–$250 (per sport ($450 all-season package)) — optional
Sibling discount	Not Published	Not Published	Multi-student assistance available (amount not published)
Lower school on campus	HS only	HS only	HS only
Open house	Nov 7, 2026	Nov 8, 2026	Not posted
Required test	ISEE (or CLT for classical-school students)	ISEE Offered on campus: Jan 9, 2027	In-house placement test
Application deadline	Jan 15, 2027	Dec 14, 2026	Not posted
Decision date	Not posted	Mar 5, 2027	Not posted
Financial aid	Need-based + Merit	Need-based + Merit	Need-based + Merit
AP courses	Not posted	18	Not posted
Enrollment	Not Published	248	80
Student:Teacher	Not Published	8.3:1	4.5:1
Mass	Daily	Monthly	Monthly
Sports	11 sports	10 sports	13 sports
Links	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.