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Daily Life

Class Schedule

  • DuchesneSix-term modular "MOD" schedule — 80-minute classes, 3-4 courses per mod, 29-30 days/mod
  • CathedralDaily Mass is built into the school day. Terms include a "Candlemas Term," with monthly "Leisure for Culture" long weekends.
  • O'ConnellNot Published
  • St. Thomas7:50 AM - 3:10 PM modified block — four 80-minute classes, 35-min advisory, 55-min lunch

Enrollment (federal data)

  • Duchesne300 (Upper School 9-12 (NCES 2023-24: 89/74/65/72). Total campus 761.)
  • CathedralNot Published
  • O'Connell80 (NCES PSS 2023-24. Island campus; 4.5:1 student-teacher ratio.)
  • St. ThomasNot Published

Transportation

  • DuchesneNot Published
  • CathedralNot Published
  • O'ConnellPaid van stops in Dickinson and La Marque (mainland commuters)
  • St. ThomasNo bus service; CarpooltoSchool partnership; parking garage (permit + fee)

Dress Code

  • DuchesneNot Published
  • CathedralNot Published
  • O'ConnellNot Published
  • St. ThomasCollared shirt + khakis + dress shoes; dress days add white button-up, red tie, blue blazer

Enrollment (school-reported)

  • DuchesneNot Published
  • CathedralNot Published
  • O'ConnellNot Published
  • St. Thomas791 (2025-26; no NCES record exists for this school)

Full Campus

  • DuchesnePK3–12 (all-girls); Upper School is grades 9–12
  • CathedralNot Published
  • O'ConnellNot Published
  • St. ThomasNot Published

School Day

  • DuchesneNot Published
  • CathedralNot Published
  • O'ConnellClasses 8:00 AM - 3:20 PM
  • St. ThomasNot Published

Student–Teacher Ratio (federal data)

  • Duchesne8.1:1 (NCES 2023-24, campus-wide)
  • CathedralNot Published
  • O'ConnellNot Published
  • St. ThomasNot Published
Commute from home
Tuition
$33,600

2026-27 rate · Upper School

$22,850

2026-27 rate

$9,100

2025-26 rate (newest published)

$27,900

2026-27 rate

What's included
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
Fees listed separately

No itemized fees published.

Fees listed separately see fees
  • Registration fee: $450
  • Technology fee: $200
  • Sports fee: $150–$250 (per sport ($450 all-season package)) — 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
Sibling discountNot PublishedNot PublishedMulti-student assistance available (amount not published)$2,000/yr per sibling after the first
Lower school on campus
Yes

PK3–12

HS onlyHS onlyHS only
Open houseNov 1, 2026Nov 7, 2026Not postedDec 6, 2026
Required test
ISEE
ISEE (or CLT for classical-school students)
In-house placement test
ISEE

Offered on campus: Nov 14, 2026 · Jan 9, 2027

Application deadlineNot postedJan 15, 2027Not postedJan 15, 2027
Decision dateNot postedNot postedNot postedMar 5, 2027
Financial aid
Need-based + Merit
Need-based + Merit
Need-based + Merit
Need-based + Merit
AP courses20Not posted321
Enrollment300Not Published80791
Student:Teacher8.1:1Not Published4.5:19:1
MassNot Published
Daily
Monthly
Monthly
Sports12 sports11 sports13 sports12 sports
Links

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