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League

St. Catherine'sGHCAA (middle/upper school) + TCSAAL (high school) — not TAPPS
St. Pius XTAPPS (6A per secondary sources) (TAPPS membership on school site; 6A classification from Wikipedia/MaxPreps, not verifiable on tapps.biz (PDF-only alignment))
CathedralTAPPS 3A + Rugby Texas Division 2

Sports Offered

St. Catherine'sVolleyball · Flag Football · Cross Country · Soccer · Basketball · Track & Field (Grades 4-12; teams as numbers allow)
St. Pius XFootball · Volleyball · Cross Country · Basketball · Soccer · Baseball · Softball · Track & Field · Golf · Tennis · Swimming · Cheer · Lacrosse · Rugby (20 varsity sports; >75% participation)
CathedralVolleyball (B/G) · Cross Country · Fencing · Basketball (B/G) · Rugby · Soccer (B/G) · Swimming · Field Hockey (G) · Track & Field · Tennis (G) · Baseball (B)

Commute from home

	St. Catherine's Montessori	St. Pius X High School	Cathedral High School
Tuition	$20,560 2026-27 rate · 9th grade; grades 10-12: $20,753	$22,850 2026-27 rate	$22,850 2026-27 rate
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 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 No itemized fees published.
Sibling discount	10% off for each younger sibling	Half tuition for a 3rd concurrently enrolled child	Not Published
Lower school on campus	Yes 14 months–12th (Montessori)	HS only	HS only
Open house	Not posted	Not posted	Nov 7, 2026
Required test	None	ISEE	ISEE (or CLT for classical-school students)
Application deadline	Jan 15, 2027	Not posted	Jan 15, 2027
Decision date	Mar 5, 2027	Not posted	Not posted
Financial aid	Need-based	Need-based + Merit	Need-based + Merit
AP courses	Not posted	Not posted	Not posted
Enrollment	23	655	Not Published
Student:Teacher	14.4:1	7:1	Not Published
Mass	Monthly	Monthly	Daily
Sports	6 sports	14 sports	11 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.