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Academics

Dual Credit

  • St. ThomasYes (4 dual-credit courses via University of St. Thomas)
  • O'ConnellYes (Via Galveston College: English III/IV, US History, Government, Spanish I/II, German IV (TSI test required))
  • St. Peter CTHSYes (Houston Community College partnership — pathway courses at St. Peter and two HCC campuses; school provides transport during the school day)
  • DuchesneYes (University of St. Thomas partnership; online electives via SophieConnect + One Schoolhouse)

Entrance Exam

  • St. ThomasISEE (School code 571055; freshmen. Transfers: ISEE or PSAT.)
  • 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.)
  • St. Peter CTHSNone (No ISEE/HSPT. Inquiry → tour → FACTS application; English + Math recommendations + transcript. Last cycle: due Jan 15, decisions Mar 6, reply Mar 25.)
  • DuchesneISEE (Administered externally; campus tour + family interview also required)

World Languages

  • St. ThomasFrench · Spanish · Mandarin · Latin
  • O'ConnellSpanish I-III · German (IV dual credit) · American Sign Language I-III
  • St. Peter CTHSNot Published
  • DuchesneFrench (incl. Advanced IV-DELF B1) · Spanish (incl. AP) · American Sign Language I-III

AP Courses

  • St. Thomas21 (40+ advanced/AP courses overall)
  • O'ConnellNot Published
  • St. Peter CTHSNot Published
  • Duchesne20 (AP enrollment caps: soph 1 / jr 2 / sr 3; AP exam required if enrolled)

Notable Programs

  • St. ThomasNot Published
  • O'ConnellSTEAM electives: Robotics, Computer Science, Esports, Horticulture, Graphic Design; Honors Engineering I & II; A La Carte program for homeschoolers
  • St. Peter CTHSNot Published
  • DuchesneRobotics and competitive debate programs; IT internship with Microsoft certification; junior Research Paper requirement

Recommendations

  • St. ThomasMath + English teachers (HAIS forms, after Dec 1); student statement + resume; report cards gr 6-8
  • O'ConnellNot Published
  • St. Peter CTHSNot Published
  • DuchesneEnglish and/or Math teacher + principal/head of school; 2 years transcripts

Application Deadline

  • St. Thomas2027-01-15 (Opens Aug 3, 2026; supporting docs due Jan 31; rolling after)
  • O'ConnellNot Published
  • St. Peter CTHSNot Published
  • DuchesneNot Published

Career & Technical Pathways

  • St. ThomasNot Published
  • O'ConnellNot Published
  • St. Peter CTHSBusiness · Construction · Education · Information Technology · Health Sciences (The school describes itself as the first Catholic career and technical high school in Texas, and the second in the United States. Graduates earn a diploma plus a Level 1 industry certification, with a possible HCC associate degree and job placement with partner businesses.)
  • DuchesneNot Published

Honors Courses

  • St. ThomasNot Published
  • O'ConnellNot Published
  • St. Peter CTHSNot Published
  • Duchesne12 (Called "Advanced" courses)

Learning Support

  • St. ThomasLearning Enrichment Center; college counseling with 4-year plan
  • O'ConnellNot Published
  • St. Peter CTHSNot Published
  • DuchesneNot Published
Commute from home
Tuition
$27,900

2026-27 rate

$9,100

2025-26 rate (newest published)

$15,000

2026-27 rate · most families pay far less after aid

$33,600

2026-27 rate · Upper School

What's included
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
Fees listed separately see fees
  • Registration fee: $450
  • Technology fee: $200
  • Sports fee: $150–$250 (per sport ($450 all-season package)) — optional
Fees listed separately

No itemized fees published.

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
Sibling discount$2,000/yr per sibling after the firstMulti-student assistance available (amount not published)Not PublishedNot Published
Lower school on campusHS onlyHS onlyHS only
Yes

PK3–12

Open houseDec 6, 2026Not postedNot postedNov 1, 2026
Required test
ISEE

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

In-house placement test
None
ISEE
Application deadlineJan 15, 2027Not postedNot postedNot posted
Decision dateMar 5, 2027Not postedNot postedNot posted
Financial aid
Need-based + Merit
Need-based + Merit
Need-based
Need-based + Merit
AP courses21Not postedNot posted20
Enrollment7918026300
Student:Teacher9:14.5:1Not Published8.1:1
Mass
Monthly
Monthly
Monthly
Not Published
Sports12 sports13 sportsNot posted12 sports
Links

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