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Academics

Entrance Exam

  • St. ThomasISEE (School code 571055; freshmen. Transfers: ISEE or PSAT.)
  • DuchesneISEE (Administered externally; campus tour + family interview also required)
  • St. Catherine'sNone (No admission test. Inquiry → adults-only tour → director meeting → application ($150) + records + lesson samples → student classroom visit. 9th graders enter the Adolescent Community (gr 7-9); High School entry is gr 10-12.)
  • St. AgnesISEE (School code 443420; up to 2 scores; first attempt before Dec 1 (ERB rule))

AP Courses

  • St. Thomas21 (40+ advanced/AP courses overall)
  • Duchesne20 (AP enrollment caps: soph 1 / jr 2 / sr 3; AP exam required if enrolled)
  • St. Catherine'sNot Published
  • St. Agnes25

Recommendations

  • St. ThomasMath + English teachers (HAIS forms, after Dec 1); student statement + resume; report cards gr 6-8
  • DuchesneEnglish and/or Math teacher + principal/head of school; 2 years transcripts
  • St. Catherine'sNot Published
  • St. AgnesEnglish + Math teachers (due Jan 14, 2027)

World Languages

  • St. ThomasFrench · Spanish · Mandarin · Latin
  • DuchesneFrench (incl. Advanced IV-DELF B1) · Spanish (incl. AP) · American Sign Language I-III
  • St. Catherine'sSpanish · Latin/French/ASL/Portuguese via independent study & university partnerships
  • St. AgnesNot Published

Dual Credit

  • St. ThomasYes (4 dual-credit courses via University of St. Thomas)
  • DuchesneYes (University of St. Thomas partnership; online electives via SophieConnect + One Schoolhouse)
  • St. Catherine'sNot Published
  • St. AgnesNot Published

Honors Courses

  • St. ThomasNot Published
  • Duchesne12 (Called "Advanced" courses)
  • St. Catherine'sNot Published
  • St. Agnes12

Academic Model

  • St. ThomasNot Published
  • DuchesneNot Published
  • St. Catherine'sAMI-accredited Catholic Montessori adolescent program — four integrated areas (Theology, Integrated Humanities, Integrated Sciences, Mathematics); internships (Houston Methodist, law/design firms), university partnerships (St. Thomas, Texas A&M AgriLife), independent study; graduates build a "body of work" (No AP program; university partnerships and internships serve the advanced-work role.)
  • St. AgnesNot Published

AP Exams Scored 3+

  • St. ThomasNot Published
  • DuchesneNot Published
  • St. Catherine'sNot Published
  • St. Agnes97 (% of AP exams scored 3+)

Application Deadline

  • St. Thomas2027-01-15 (Opens Aug 3, 2026; supporting docs due Jan 31; rolling after)
  • DuchesneNot Published
  • St. Catherine'sNot Published
  • St. AgnesNot Published

Language Credits Required

  • St. ThomasNot Published
  • DuchesneNot Published
  • St. Catherine'sNot Published
  • St. Agnes2

Learning Support

  • St. ThomasLearning Enrichment Center; college counseling with 4-year plan
  • DuchesneNot Published
  • St. Catherine'sNot Published
  • St. AgnesNot Published

Notable Programs

  • St. ThomasNot Published
  • DuchesneRobotics and competitive debate programs; IT internship with Microsoft certification; junior Research Paper requirement
  • St. Catherine'sNot Published
  • St. AgnesNot Published

Robotics

  • St. ThomasNot Published
  • DuchesneNot Published
  • St. Catherine'sNot Published
  • St. AgnesSpectrum 3847 — 12 consecutive FIRST Championship appearances

Test Score Deadline

  • St. ThomasNot Published
  • DuchesneNot Published
  • St. Catherine'sNot Published
  • St. Agnes2027-02-01
Commute from home
Tuition
$27,900

2026-27 rate

$33,600

2026-27 rate · Upper School

$20,560

2026-27 rate · 9th grade; grades 10-12: $20,753

$28,400

2026-27 rate

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
  • 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 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
  • Application fee: $75 ($125 for transfer applicants)
  • Enrollment deposit: $500
  • Tablet PC (technology): $1,725
  • AP test fee: $105 (per AP / Honors-AP class) — optional
  • Senior fee: $350 (seniors only) — optional
  • Athletics fee: $150 (per sport) — optional
Sibling discount$2,000/yr per sibling after the firstNot Published10% off for each younger siblingNot Published
Lower school on campusHS only
Yes

PK3–12

Yes

14 months–12th (Montessori)

HS only
Open houseDec 6, 2026Nov 1, 2026Not postedNot posted
Required test
ISEE

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

ISEE
None
ISEE

Offered on campus: Nov 14, 2026

Application deadlineJan 15, 2027Not postedJan 15, 2027Not posted
Decision dateMar 5, 2027Not postedMar 5, 2027Not posted
Financial aid
Need-based + Merit
Need-based + Merit
Need-based
Need-based

No merit scholarships

AP courses2120Not posted25
Enrollment79130023934
Student:Teacher9:18.1:114.4:19:1
Mass
Monthly
Not Published
Monthly
Weekly

Thursdays, 9:10 AM

Sports12 sports12 sports6 sports12 sports
Links

“Not posted” means the school hasn’t published it yet for this admissions cycle — check each school’s full profile for sources.