Type
Day
Enrollment
483
Student-Teacher Ratio
7:1
Admit Rate
-
Reach
Local / Regional
Narrative
Profile Notes
Summary
Keystone School is a coeducational, independent, college-preparatory day school in San Antonio, Texas, serving PK3-12. The 2025-2026 profile reports 483 total PK3-12 enrollment, 124 students in grades 9-12, a 7:1 student-to-faculty ratio, 16 upper-school faculty, an average class size of 13, 19 AP-designated course offerings, and 100% of graduates enrolling in four-year colleges and universities.
College Counseling
100% of graduates enroll in 4 year colleges and universities
Advanced Coursework
All courses are Honors or AP level; many non-AP courses are among the most demanding; students are required to take 5 AP courses; 9th graders may not take AP courses; 10th graders are limited to 2 required AP courses; AP students are not required to take the AP exam.
Matriculation Notes
College Matriculation 2020-2025
Siviq Layer
Siviq Scores
Siviq Scores
Precomputed percentiles relative to similar schools. These scores are descriptive rather than judgmental.
Academic Program
37th percentile
Higher reported academic program than 37% of similar schools.
Combines advanced-course offerings, testing, and reported honors or IB signals.
Average Class Size
73rd percentile
Lower reported average class size than 73% of similar schools.
Smaller reported average classes score higher within each peer cohort.
Institutional Resources
15th percentile
Higher reported institutional resources than 15% of similar schools.
Uses linked nonprofit financial capacity when a reviewed EIN match is available.
Outcomes
82nd percentile
Higher reported outcomes than 82% of similar schools.
Based on reported college destinations in the current school profile.
Reach & Access
16th percentile
Higher reported reach & access than 16% of similar schools.
Combines geographic reach and reported access signals from the current school data.
Student Experience
50th percentile
Lower reported student experience than 50% of similar schools.
Lower student-teacher ratios score higher within each peer cohort.
Standardized Data
Profile
Profile
Overview
- Grades Served
- 12
Profile
Academics
- AP Courses
- 19
- Honors Program
- Yes
- Average SAT
- 1,356
- Average ACT
- 28
Profile
Student Body
- Students of Color
- 60%
- Receiving Financial Aid
- 12%
Profile
Policies
- Class Rank Policy
- Keystone does not rank its students or award academic honors or distinctions.
- Weighted Grades
- Yes
- Weighted Grades Policy
- Keystone uses an unweighted numeric grading scale for individual academic courses and raw unweighted grades appear on the transcript; beginning 2024, a 5% GPA weight is added and cumulative weighted GPA is reported.
Linked Nonprofit Data
Nonprofit Financials
Net Assets
$14,803,414
Tax year 2024
Net Income
$1,007,354
Latest revenue minus expenses from the school's nonprofit filing.
Total Expenses
$12,902,773
Tax year 2024
Expenses Per Student
$26,714
Calculated from total expenses divided by the current school-profile enrollment.
Location Context
Nearest
Institutional Details
People & Credentials
Institutional
Leadership
Head of School
William B. Handmaker
Head of Upper School
Bill Spedding
Director of College Counseling
Sara Christiansen
Institutional
Contacts
Director of College Counseling
Sara Christiansen
Main school contact
School Contact
www.KeystoneSchool.org; 119 E. Craig Place, San Antonio, TX 78212
Institutional
Accreditations
Accreditation/Affiliation listed
Independent Schools Association of the Southwest
Also shown as ISAS.
Affiliation listed
National Association of Independent Schools
Also shown as NAIS.
College counseling accreditation/affiliation listed
National Association for College Admission Counseling
Listed as NACAC.
College counseling accreditation/affiliation listed
Texas Association for College Admission Counseling
Listed as TACAC.
College counseling accreditation/affiliation listed
Association of College Counselors in Independent Schools
Listed as ACCIS.
College counseling accreditation/affiliation listed
College Board
Institutional
School Codes
CEEB CODE
446158
External References
Links
College Outcomes
Top Colleges
Search & Answers
Keystone School Frequently Asked Questions
What is the student-teacher ratio at Keystone School?
The current school profile reports a student-teacher ratio of 7:1 at Keystone School.
How many students are enrolled at Keystone School?
The current school profile reports about 483 students enrolled at Keystone School.
What grades does Keystone School offer?
Keystone School currently reports serving grades 12.
Is Keystone School a day school or a boarding school?
Keystone School is a private school.
Does Keystone School offer advanced placement (AP) courses?
Yes. The current school profile reports 19 AP courses at Keystone School.
How many students receive financial aid at Keystone School?
The current school profile says about 12.0% of students at Keystone School receive financial aid.
Which colleges show up most often for Keystone School?
The current school profile highlights Austin College as one of the top reported college destinations for Keystone School.
What does Keystone look for in admissions?
Keystone describes its process as highly selective and says it weighs motivation along with intellectual ability, using prior academic performance, standardized test scores, interviews, and teacher recommendations.
Does Keystone rank students?
No. Keystone says it does not rank students or award academic honors or distinctions.
How does Keystone report GPA?
Keystone uses a 1–100 unweighted numeric scale for individual courses and shows raw unweighted grades on the transcript. Beginning in 2024, it also adds a 5% GPA weight to reflect course rigor and reports a cumulative weighted GPA.
Who is the college counseling contact?
Sara Christiansen is listed as Director of College Counseling, with email [email protected] and extension 387.
By Geography
Nearby Schools
By Similarity
Similar Schools
Provenance
Sources
| Source | Type | Checked | Metrics |
|---|---|---|---|
| 2025-2026 School Profile (PDF) Used for normalized profile metrics, school facts, FAQ answers, and school SEO metadata. | School Profile PDF | Apr 01, 2026 | AP Courses • Academic Rigor Category • Access Category • Accreditations • Advanced Course Notes • Average ACT • More normalized profile fields |
| 2025-2026 school profile PDF keystoneschool.org/wp-content/uploads/2025/12/Keystone-School-Profile-2025-26.pdf | Official Linked File | May 11, 2026 | AP Courses • Average Class Size • Faculty Count • Founded Year • Receiving Financial Aid • Student-Teacher Ratio • Students of Color |
| Accredited Pre-K-12 Online Private School | The Keystone School www.keystoneschoolonline.com | Official Website Page | May 11, 2026 | Enrollment • Honors Program |
| Admission & Graduation Requirements | The Keystone School www.keystoneschoolonline.com/k-12/admissions-graduation-requirements | Official Website Page | May 11, 2026 | Grades Served |
Sources & Data QualityMirrored artifacts, website inventory, and normalization review notes for this school profile.
Source Links
Known Website Addresses
All Canonical Metrics
| Metric | Value | Evidence |
|---|---|---|
| Grades Served | 12 | An accelerated PK3-12 Independent School; Keystone’s mission is to offer an accelerated PK3 – 12 curriculum. |
| Lowest Grade | 12 | 12 |
| Highest Grade | 12 | 12 |
| Postgraduate Offered | - | 12 |
| Boarding Status | Day | Keystone School is a coeducational, independent, college preparatory day school located in an urban neighborhood of San Antonio. |
| Boarding Status Code | day | Day |
| School Type | Private | Keystone School is a coeducational, independent, college preparatory day school located in an urban neighborhood of San Antonio. |
| School Type Code | private | Private |
| Enrollment | 483 | Campus Snapshot: Student Body: 483 Total Enrollment (PK3-12). |
| Residential Enrollment | - | - |
| Day Enrollment | - | - |
| Student-Teacher Ratio | 7 | Upper School Faculty: 7:1 student-to-faculty ratio. |
| Founded Year | 1948 | Founded in 1948 |
| School Leadership | - | ADMINISTRATION: William B. Handmaker, Head of School, [email protected]. |
| Key Contacts | - | Sara Christiansen, Director of College Counseling, [email protected] • ext. 387. |
| Accreditations | - | Accreditations and Affiliations: Independent Schools Association of the Southwest (ISAS). |
| School Codes | - | CEEB CODE: 446158. |
| AP Courses | 19 | Upper School Course Offerings lists AP Environmental Science, AP Computer Science A, AP Biology, AP Chemistry, AP Physics C: Electricity & Magnetism, AP Physics C: Mechanics, AP World History, AP United States History, AP Statistics, AP Calculus AB, AP Calculus BC, AP French Language & Culture, AP Spanish Language, AP Spanish Literature & Culture, AP 2D Art & Design, AP 3D Art & Design, AP Drawing, AP English Language & Composition, and AP English Literature & Composition. |
| Average Class Size | 13 | Average class size of 13 |
| IB Program | - | - |
| Honors Program | Yes | AP Exams and Course Load: All courses offered are Honors or AP Level and follow a semester schedule. |
| Advanced Course Notes | All courses are Honors or AP level; many non-AP courses are among the most demanding; students are required to take 5 AP courses; 9th graders may not take AP courses; 10th graders are limited to 2 required AP courses; AP students are not required to take the AP exam. | All courses offered are Honors or AP Level and follow a semester schedule. Many courses not designated AP are still considered among our most demanding. Students are required to take 5 AP courses (2 AP English, 2 AP History, and AP Statistics). 9th graders are not allowed to take AP courses; 10th graders are limited to 2 required AP courses. Students enrolled in AP are not required to take the AP exam. |
| Faculty Count | 16 | 16 Faculty |
| College Counseling Summary | 100% of graduates enroll in 4 year colleges and universities | Student Body: 100% of graduates enroll in 4 year colleges and universities. |
| Testing Policy | - | - |
| Testing Policy Code | - | - |
| Average SAT | 1356 | SAT Class of 2025 Mean: EBRW 683, Math 673, Total 1356, Mid 50% 1210-1520. |
| Average ACT | 28 | ACT Class of 2025 Mean: English 29, Math 24, Reading 31, Science 28, Composite 28, Mid 50% 25-30. |
| Matriculation Summary | College Matriculation 2020-2025 | COLLEGE MATRICULATION 2020-2025; *Bold indicates Class of 2025 matriculation. |
| Top Colleges | - | Austin College; Bard College; Barnard College; Bates College; Boston University 2; Bowdoin College 2; Brown University 2; Carnegie Mellon University 2; Columbia University 2; Cornell University 3; Duke University 2; Georgetown University; Georgia Institute of Technology; Harvard University; Johns Hopkins University 2; Massachusetts Institute of Technology 4; New York University 2; Northeastern University 5; Northwestern University; Pomona College; Princeton University; Rice University 6; Southern Methodist University 3; Southwestern University 6; Stanford University 3; Texas A&M University - College Station 6; The University of Texas at Austin 27; The University of Texas at Dallas 2; The University of Texas at San Antonio 4; Trinity University 9; Tulane University 4; University of California-Berkeley 2; University of Chicago 2; University of Notre Dame 2; University of Pennsylvania 5; University of Southern California; Vanderbilt University; Washington University in St Louis 3; Wellesley College 2; Yale University 2 |
| States Represented | - | - |
| Countries Represented | - | - |
| Students of Color | 60 | Campus Snapshot: Student Body: 60% students of color. |
| International Students | - | - |
| Receiving Financial Aid | 12 | Student Body: 12% of students in K-12 receive tuition assistance. |
| Tuition-Free Share | - | - |
| Applicants | - | - |
| Admitted | - | - |
| Matriculated | - | - |
| Admit Rate | - | - |
| Yield Rate | - | - |
| Class Rank Policy | Keystone does not rank its students or award academic honors or distinctions. | Rank and Grading Scale: Keystone does not rank its students or award academic honors or distinctions. |
| Class Rank Policy Code | - | Keystone does not rank its students or award academic honors or distinctions. |
| Weighted Grades | Yes | Beginning 2024, students receive a weight of 5% added to their GPA to reflect the rigor of our courses. A cumulative weighted GPA is reported on the transcript and calculated using only graded courses earned at Keystone. |
| Weighted Grades Policy | Keystone uses an unweighted numeric grading scale for individual academic courses and raw unweighted grades appear on the transcript; beginning 2024, a 5% GPA weight is added and cumulative weighted GPA is reported. | Keystone uses an unweighted numeric grading scale (1-100) for individual academic courses. Raw grades (unweighted) are shown on the transcript. Beginning 2024, students receive a weight of 5% added to their GPA to reflect the rigor of our courses. A cumulative weighted GPA is reported on the transcript and calculated using only graded courses earned at Keystone. |
| Disciplinary Reporting | - | - |
| Boarding Model | day_only | day_only |
| Selectivity Category | highly_selective | highly_selective |
| Academic Rigor Category | very_high | very_high |
| Testing Policy Category | not_reported | not_reported |
| College Counseling Category | established | established |
| Student Body Reach Category | regional | regional |
| Access Category | limited_access | limited_access |
| Outcome Category | exceptional_outcomes | exceptional_outcomes |
| Signals | - | Reported as a coeducational, independent, college-preparatory day school in San Antonio.; Admissions process is described as highly selective and considers prior academic performance, standardized test scores, interviews, and teacher recommendations; no admit rate is reported.; Class of 2025 mean SAT is 1356 with mid-50% 1210-1520; mean ACT is 28 with mid-50% 25-30.; All courses are Honors or AP level; students are required to take 5 AP courses; 19 AP-designated course offerings are reported.; 2025 AP results: 90 students took 278 AP exams, with 92% of scores 3 or higher.; Class of 2026 National Merit recognition is reported at 22%.; College counseling has a named Director of College Counseling and listed NACAC, TACAC, ACCIS, and College Board affiliations.; College testing policy is not reported.; Student-body reach evidence is regional: 50 zip codes represented; no states or countries represented are reported.; Financial-aid participation is limited in the supplied evidence: 12% of K-12 students receive tuition assistance.; Outcomes evidence includes 100% of graduates enrolling in four-year colleges/universities and a 2020-2025 matriculation list with multiple highly selective destinations including MIT, Stanford, Brown, Columbia, Cornell, Duke, Harvard, Princeton, Penn, and Yale. |