Enrollment
554
California · 2024-25 NCES data
Elementary school (grades K-5) · San Jose, CA
Alpha: Cornerstone Academy Preparatory
Federal NCES profile for Alpha: Cornerstone Academy Preparatory, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 37/100.
2024-25 NCES dataElementary school (grades K-5)NCES 060167112639Charter school
👥 S:T ratio 8
🌟 Gifted program 30
📋 Attendance 74
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Alpha: Cornerstone Academy Preparatory earns 37/100 on the Resource Investment Index, with class sizes near the California median.
- #39 of 154
- elementary schools in San Jose · Resource Index
- 37
- Resource Index · Typical
- 23.1:1
- students per teacher
- 44.8%
- free-lunch eligible
Alpha: Cornerstone Academy Preparatory has class sizes near the California median. Computed live against every California school reporting to NCES.
By Resource Investment Index, Alpha: Cornerstone Academy Preparatory ranks #39 of 154 elementary schools in San Jose, CA.
School address
NCES ID 060167112639 Verify on NCES CCD record →
Teachers (FTE)
24.0
Federal CCD staff survey
Students per teacher
23.1:1
vs 21.5:1 California avg
+7% vs state
Free-lunch eligible
44.8%
vs 55.5% California avg
-19% vs state
Student-teacher ratio in context
How Alpha: Cornerstone Academy Preparatory compares with California and U.S. medians
What stands out at Alpha: Cornerstone Academy Preparatory
Alpha: Cornerstone Academy Preparatory is a mid-sized charter elementary school in San Jose, California, enrolling 554 students.
Class loads run somewhat heavier than typical: 23.1:1 puts it in the larger third of California schools by student-teacher ratio.
Economic need runs somewhat below the state's typical profile, with 44.8% of students eligible for free meals.
With 554 students, its enrollment sits close to the California median campus size.
Its Resource Investment Index lands in the upper third of 9,998 scored California schools.
Against 1,421 statewide peers matched on enrollment and economic need, it ranks in the upper tier at #262.
Its student body is led by Asian (57%) and Hispanic or Latino (36%) (diversity index 55/100).
10.3% of students were chronically absent in the 2021-22 collection, in line with the post-pandemic national range.
Among San Jose's elementary schools, it stands alongside Easterbrook Discovery (952 students): Alpha: Cornerstone Academy Preparatory is smaller than that campus by headcount and runs heavier classes (23.1:1 vs 22.1:1).
Alpha: Cornerstone Academy Preparatory District is a single-school charter district, so Alpha: Cornerstone Academy Preparatory operates independently rather than alongside district-mates.
Sourced from NCES CCD, CRDC, and F-33 (federal records, not a quality verdict). How we source and compute this.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
How Alpha: Cornerstone Academy Preparatory compares
Alpha: Cornerstone Academy Preparatory on the metrics families compare, against California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 23.1:1 | ▲ 7% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 44.8% | ▼ 19% | 55.5% | 51.7% |
| Enrollment | 554 | top 38% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
23.1:1
Leaner classes than 8% of US schools, heavier class loads than most.
554
Bigger than 68% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
44.8%
free-lunch eligible
- 19% below the California average of 55.5%
Above the 40% Title I schoolwide threshold; federal funds support the whole school, not individual students.
Staffing depth
23.1:1
students per teacher
- 7% above state mean
Top 63% in California - lower ratio than 37% of state schools
Above 20:1, running heavier than the typical U.S. public school; staffing is comparatively stretched.
Engagement
10.3%
chronically absent (missed 10%+ of school days)
In the 10-15% range, above the pre-pandemic national baseline but within the broader post-pandemic picture.
Funding equity
$13,697
per pupil, district-wide
- below California avg of $16,509
Somewhat below the U.S. average per-pupil spend; funding constraints may affect programs, facilities, and staffing.
Support staff
Counselors0.0 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
0
in-school suspensions + 5 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 0.9 per 100 students. Reported via the Civil Rights Data Collection.
Overview
- Common Core of Data (June 2026): enrollment, staffing, and the student-teacher ratio above.
- Civil Rights Data Collection: discipline counts and program access (AP, gifted, special education).
- F-33 School District Finance Survey: the district-wide per-pupil spending figures below.
Three separate federal collections, each on its own reporting cadence - which is why this school's numbers line up on a consistent basis against every other school and state on this site, rather than mixing figures pulled from different survey years.
Student demographics
Asian 56.9%
Hispanic or Latino 35.6%
Two or More 3.2%
White 2.3%
African American 2.0%
Largest group: Asian at 56.9% of enrollment.
Student-body diversity index 54.8/100
Simpson diversity index - at 54.8, Alpha: Cornerstone Academy Preparatory is more mixed than the California school average of 46.0.
Programs
Funding & spending
District-wide per-pupil expenditure for Alpha: Cornerstone Academy Preparatory District, which includes Alpha: Cornerstone Academy Preparatory.
$13,697
Per student
-17%
vs California
Avg $16,509
-17%
vs U.S.
Avg $16,593
Revenue mix
Local 31.7%
State 60.2%
Federal 8.0%
Source: NCES F-33 School District Finance Survey District-level finance · FY 2021-22 Per-pupil expenditure reflects the district-wide average. Individual school budgets are not reported at the federal level.
Similar elementary schools in San Jose
6 comparable elementary schools (grades K-5) serving the same city.
Easterbrook Discovery
Standard public school
952 students 22.1:1 students per teacher
Merritt Trace Elementary
Standard public school
829 students 23:1 students per teacher
Orchard Elementary
Standard public school
740 students 16.4:1 students per teacher
Tom Matsumoto Elementary
Standard public school
727 students 24.2:1 students per teacher
Herman (Leonard) Intermediate
Standard public school
723 students 22.6:1 students per teacher
Booksin Elementary
Standard public school
715 students 23.8:1 students per teacher
Similar elementary schools statewide
Matched by enrollment size and by staffing ratio across all of California, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~554 students)
Similar student-teacher ratio (~23.1:1)
Next steps
Verify locally before acting on Alpha: Cornerstone Academy Preparatory's federal record.
- Compare Alpha: Cornerstone Academy Preparatory against another school. Compare schools
- Alpha: Cornerstone Academy Preparatory District's spending and staffing shape this school. District profile
- Confirm current enrollment and boundaries with the school. Choosing guide
Federal record (CCD 2024-25, CRDC 2021-22) - PlainSchools assigns no subjective rating; the composite quality score is a transparent, reproducible index computed from this cited federal data.
Frequently asked questions about Alpha: Cornerstone Academy Preparatory
How many students attend Alpha: Cornerstone Academy Preparatory?
Alpha: Cornerstone Academy Preparatory has 554 students enrolled. It is an elementary school in San Jose, CA.
What is the student-teacher ratio at Alpha: Cornerstone Academy Preparatory?
The student-teacher ratio at Alpha: Cornerstone Academy Preparatory is 23.1:1, which is 7% higher than the California average of 21.5:1 and 47% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Alpha: Cornerstone Academy Preparatory?
44.8% of students at Alpha: Cornerstone Academy Preparatory are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Alpha: Cornerstone Academy Preparatory?
The largest demographic group at Alpha: Cornerstone Academy Preparatory is Asian at 56.9% of enrollment, in San Jose, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 54.8/100.
What is the Resource Investment Index for Alpha: Cornerstone Academy Preparatory?
Alpha: Cornerstone Academy Preparatory has a Resource Investment Index of 37/100 (typical reported resources relative to schools nationally) based on 3 factors: student-teacher ratio, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Alpha: Cornerstone Academy Preparatory rank among elementary schools in San Jose?
By Resource Investment Index, Alpha: Cornerstone Academy Preparatory ranks #39 of 154 elementary schools in San Jose, CA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all elementary schools in San Jose on the city page.
Is Alpha: Cornerstone Academy Preparatory a good school?
Alpha: Cornerstone Academy Preparatory earns 37/100 on the Resource Investment Index, with class sizes near the California median. This is a resource snapshot, not an academic rating; see the Resource Investment Index question above for what the number does and doesn't measure.
What other schools are in Alpha: Cornerstone Academy Preparatory District?
None; Alpha: Cornerstone Academy Preparatory District is a single-school charter district, and Alpha: Cornerstone Academy Preparatory is its only campus.
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Every figure on PlainSchools is rendered directly from the source NCES, CRDC and F-33 federal records, no number is typed in by an editor. Each school's figures reflect its most recent NCES/CRDC submission on file. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of June 2026.