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Mass

St. John XXIIIWeekly all-school Mass (Day not published; moves for Solemnities and Holy Days. Students attend in full Mass uniform.)
St. Catherine'sMonthly (School-wide statement (all levels attend monthly); no high-school-specific schedule published. Daily student-led communal prayer; weekly Atrium (Catechesis of the Good Shepherd).)
FrassatiWeekly — Thursdays, 9:15 AM (All-School Mass) (Plus monthly Eucharistic Adoration, scaling from a short prayer in 9th grade to a full Holy Hour by senior year)

Retreats

St. John XXIIIMandatory class retreats (Oboedientia/Pax/Virtus/Renovatio) + optional Kairos (jr/sr) and Quest (fr/so); daily Mass + weekly all-school Mass
St. Catherine'sNot Published
FrassatiYearly class retreats; weekly All-School Mass (Thu 9:15); monthly Eucharistic Adoration scaling to a full senior Holy Hour; Italy pilgrimage "In the Footsteps of Pier Giorgio"

Service Program

St. John XXIIINot Published
St. Catherine'sService-learning with 54 partner organizations (Houston Food Bank, Catholic Charities, Houston Zoo); HS community service trips and retreats (no published hour requirement)
FrassatiPier Giorgio Service Learning: 9th weekly school-community duty; 10th 10 hrs; 11th 20 hrs (marginalized-serving agencies); 12th 20 hrs with one agency. Counts for 5% of Religion grade.

Daily Mass

St. John XXIIIAvailable daily throughout the year (Plus Eucharistic adoration, twice-yearly penance services, daily Angelus)
St. Catherine'sNot Published
FrassatiNot Published

Religious Tradition

St. John XXIIINot Published
St. Catherine'sFounded 1966 by Dominican Sisters; independent Catholic with Dominican charism; Catechesis of the Good Shepherd; HS theology aligned with the Archdiocese
FrassatiNot Published

Service Hours by Grade

St. John XXIIIFreshmen 20 · Sophomores 25 · Juniors 25 · Seniors 30 (per year, with due dates each spring)
St. Catherine'sNot Published
FrassatiNot Published

Commute from home

	St. John XXIII College Preparatory	St. Catherine's Montessori	Frassati Catholic High School
Tuition	$22,100 2026-27 rate	$20,560 2026-27 rate · 9th grade; grades 10-12: $20,753	$24,050 2026-27 rate
What's included	Fees listed separately see fees New Student Enrollment Fee: $500 Financial aid application (Clarity): $60 — 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	Included in tuition see list Technology fee ($500) Registration ($300) Student activities ($400) Textbooks ($650) Charged separately: Application fee: $75–$125 Enrollment deposit (new families): $700 Athletics & Fine Arts fee: $250 (per sport/season) — optional
Sibling discount	2nd student $17,680 ($4,420 off)	10% off for each younger sibling	$3,000 off 2nd student; $9,425 off 3rd (tuition only)
Lower school on campus	HS only	Yes 14 months–12th (Montessori)	HS only
Open house	Not posted	Not posted	Oct 28, 2026
Required test	ISEE	None	HSPT or ISEE Offered on campus: Jan 9, 2027 · Jan 23, 2027
Application deadline	Not posted	Jan 15, 2027	Not posted
Decision date	Not posted	Mar 5, 2027	Not posted
Financial aid	Need-based + Merit	Need-based	Need-based
AP courses	Not posted	Not posted	Not posted
Enrollment	432	23	364
Student:Teacher	11.3:1	14.4:1	11:1
Mass	Weekly Daily Mass also offered	Monthly	Weekly Thursdays, 9:15 AM
Sports	13 sports	6 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.