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Academics

Entrance Exam

  • 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. ThomasISEE (School code 571055; freshmen. Transfers: ISEE or PSAT.)
  • DuchesneISEE (Administered externally; campus tour + family interview also required)
  • St. AgnesISEE (School code 443420; up to 2 scores; first attempt before Dec 1 (ERB rule))

AP Courses

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

Recommendations

  • St. Catherine'sNot Published
  • 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. AgnesEnglish + Math teachers (due Jan 14, 2027)

World Languages

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

Dual Credit

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

Honors Courses

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

Academic Model

  • 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. ThomasNot Published
  • DuchesneNot Published
  • St. AgnesNot Published

AP Exams Scored 3+

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

Application Deadline

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

Language Credits Required

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

Learning Support

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

Notable Programs

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

Robotics

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

Test Score Deadline

  • St. Catherine'sNot Published
  • St. ThomasNot Published
  • DuchesneNot Published
  • St. Agnes2027-02-01
Commute from home
Tuition
$20,560

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

$27,900

2026-27 rate

$33,600

2026-27 rate · Upper School

$28,400

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
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: $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 discount10% off for each younger sibling$2,000/yr per sibling after the firstNot PublishedNot Published
Lower school on campus
Yes

14 months–12th (Montessori)

HS only
Yes

PK3–12

HS only
Open houseNot postedDec 6, 2026Nov 1, 2026Not posted
Required test
None
ISEE

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

ISEE
ISEE

Offered on campus: Nov 14, 2026

Application deadlineJan 15, 2027Jan 15, 2027Not postedNot posted
Decision dateMar 5, 2027Mar 5, 2027Not postedNot posted
Financial aid
Need-based
Need-based + Merit
Need-based + Merit
Need-based

No merit scholarships

AP coursesNot posted212025
Enrollment23791300934
Student:Teacher14.4:19:18.1:19:1
Mass
Monthly
Monthly
Not Published
Weekly

Thursdays, 9:10 AM

Sports6 sports12 sports12 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.