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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.)
St. John XXIIIISEE (School code 570048; 9th grade. 11th/12th transfers submit PSAT. Last cycle: opened Sept 1, deadline Jan 15, docs Jan 31, rolling after.)

Recommendations

CathedralMath, English + Administrator (HAIS forms); transcripts 3 prior years; student essay
Incarnate WordMath + English teachers (HAIS forms); transcripts 6th, 7th, 1st-sem 8th
St. John XXIIITeacher recommendations (school forms) + official transcripts; interviews for transfers only

Dual Credit

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
St. John XXIIINot 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)
St. John XXIIINot Published

AP Program

CathedralNot Published
Incarnate WordNot Published
St. John XXIIIAP and honors coursework offered (count not published; Course Selection Guide not public)

Application Deadline

CathedralNot Published
Incarnate Word2026-12-14 (Earliest deadline of the Houston Catholic schools; supplemental materials Jan 29, 2027)
St. John XXIIINot Published

Family Interview

Learning Support

CathedralLearning Enrichment Center — an individual learning plan for every student; tutoring, accommodations and testing support
Incarnate WordNot Published
St. John XXIIINot Published

Notable Programs

Commute from home

	Cathedral High School	Incarnate Word Academy	St. John XXIII College Preparatory
Tuition	$22,850 2026-27 rate	$22,800 2026-27 rate	$22,100 2026-27 rate
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 New Student Enrollment Fee: $500 Financial aid application (Clarity): $60 — optional
Sibling discount	Not Published	Not Published	2nd student $17,680 ($4,420 off)
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	ISEE
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	432
Student:Teacher	Not Published	8.3:1	11.3:1
Mass	Daily	Monthly	Weekly Daily Mass also offered
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.