- Enrollment
- 860
- Students per teacher
- 19.5:1
- Resource Index
- 29/100
Elementary school (grades K-5) · Mountain View, CA
Mariano Castro Elementary
Federal NCES profile for Mariano Castro Elementary, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 26/100.
2024-25 NCES dataElementary school (grades K-5)NCES 062628003923
👥 S:T ratio 24
🌟 Gifted program 30
🎓 Counselors 50
📋 Attendance 1
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Mariano Castro Elementary earns 26/100 on the Resource Investment Index, even as it posts class sizes smaller than 72% of California schools. It is also less racially and ethnically mixed than most California schools.
- #9 of 10
- elementary schools in Mountain View · Resource Index
- 26
- Resource Index · Lower
- 19.1:1
- small classes for California
- 77.8%
- free-lunch eligible
Mariano Castro Elementary has class sizes smaller than 72% of California schools. Computed live against every California school reporting to NCES.
By Resource Investment Index, Mariano Castro Elementary ranks #9 of 10 elementary schools in Mountain View, CA.
School address
District: Mountain View Whisman · California
NCES ID 062628003923 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
+9 students YoY
Mariano Castro Elementary held near 257 students from 2022-23 to 2023-24 (+9 headcount).
Teacher FTE added 13.0 → 14.0 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Steady CCD campus
+9 students YoY 062628003923 · Mountain View, CA Elementary · SMALL · TRAD
248 enr · 19.1:1 · 77.8% lunch · RII 26
Nearest enrollment peer: Isaac Newton Graham Middle (860 students)
Mariano Castro Elementary held near 257 students from 2022-23 to 2023-24 (+9 headcount). Teacher FTE added 13.0 → 14.0 across the same CCD years. Read with this school → · District book → · California schools → · Find another →
Mariano Castro Elementary in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- Isaac Newton G
Isaac Newton Graham Middle
860 students
- Crittenden Mid
Crittenden Middle
616 students
- Stevenson Elem
Stevenson Elementary
461 students
- Edith Landels
Edith Landels Elementary
399 students
- Amy Imai Eleme
Amy Imai Elementary
388 students
- This school 248
Mariano Castro Elementary
248 students
What this shows Mariano Castro Elementary reports 248 students on the CCD universe file.
How Mariano Castro Elementary compares
Mariano Castro Elementary held steady on CCD headcount: ratios and free-lunch share vs California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 19.1:1 | ▼ 11% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 77.8% | ▲ 40% | 55.5% | 51.7% |
| Enrollment | 248 | top 79% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
19.1:1
Leaner classes than 19% of US schools, heavier class loads than most.
248
Bigger than 25% of US schools by enrollment, mid-sized for the country.
Equity indicators methodology
Economic need
77.8%
free-lunch eligible
- 40% above the California average of 55.5%
Above the 40% Title I schoolwide threshold; federal funds support the whole school, not individual students.
Staffing depth
19.1:1
students per teacher
- 11% below state mean
Top 28% in California - lower ratio than 72% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Engagement
39.5%
chronically absent (missed 10%+ of school days)
At or above 20%, the commonly used threshold for "high" chronic absenteeism, signaling significant barriers to regular attendance.
Funding equity
$22,471
per pupil, district-wide
- above California avg of $18,665
Well above the U.S. public-school average, reflecting substantially higher local or state investment per enrolled student.
Support staff
Counselors1.0 FTE
Per 248 students, the combined health-and-guidance staffing load for this school.
Discipline context
10
in-school suspensions + 12 out-of-school
Suspension rate: 4.0 per 100 students. Combined in-school and out-of-school rate: 8.9 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
Hispanic or Latino 91.1%
Asian 4.0%
White 3.6%
Native Hawaiian / Pacific Islander 0.8%
Two or More 0.4%
Largest group: Hispanic or Latino at 91.1% of enrollment.
Student-body diversity index 16.7/100
Simpson diversity index - at 16.7, Mariano Castro Elementary is less mixed than the California school average of 46.0.
Programs
District finance for Mountain View Whisman reports $22,471 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Mariano Castro Elementary Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Isaac Newton Graham Middle | Larger | Lower economic need | Similar S:T ratio |
| Crittenden Middle | Larger | Lower economic need | Similar S:T ratio |
| Stevenson Elementary | Larger | Lower economic need | Higher S:T ratio |
| Edith Landels Elementary | Larger | Lower economic need | Higher S:T ratio |
| Amy Imai Elementary | Larger | Lower economic need | Higher S:T ratio |
Comparisons are relative to Mariano Castro Elementary's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 616
- Students per teacher
- 19.9:1
- Resource Index
- 28/100
- Enrollment
- 461
- Students per teacher
- 24.3:1
- Resource Index
- 37/100
- Enrollment
- 399
- Students per teacher
- 22.2:1
- Resource Index
- 31/100
- Enrollment
- 388
- Students per teacher
- 22.8:1
- Resource Index
- 39/100
Similar elementary schools in Mountain View
6 comparable elementary schools (grades K-5) serving the same city.
Stevenson Elementary
Standard public school
461 students 24.3:1 students per teacher
Edith Landels Elementary
Standard public school
399 students 22.2:1 students per teacher
Amy Imai Elementary
Standard public school
388 students 22.8:1 students per teacher
Jose Antonio Vargas Elementary
Standard public school
368 students 23:1 students per teacher
Gabriela Mistral Elementary
Standard public school
366 students 24.4:1 students per teacher
Springer Elementary
Standard public school
365 students 18.3:1 students per teacher
Nationwide elementary schools with similar size or staffing
Out-of-state peers matched by enrollment and by student-teacher ratio, not the same-city or same-district lists above.
Similar enrollment (~248 students)
Frequently asked questions about Mariano Castro Elementary
How many students attend Mariano Castro Elementary?
Mariano Castro Elementary has 248 students enrolled. It is an elementary school in Mountain View, CA. CCD year-over-year: 248 (2022-23) → 257 (2023-24), nearly flat (+9).
What is the student-teacher ratio at Mariano Castro Elementary?
The student-teacher ratio at Mariano Castro Elementary is 19.1:1, which is 11% lower than the California average of 21.5:1 and 22% higher than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What percentage of students receive free lunch at Mariano Castro Elementary?
77.8% of students at Mariano Castro Elementary are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Mariano Castro Elementary?
The largest demographic group at Mariano Castro Elementary is Hispanic or Latino at 91.1% of enrollment, in Mountain View, CA.
What is the Resource Investment Index for Mariano Castro Elementary?
Mariano Castro Elementary has a Resource Investment Index of 26/100 (lower reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, gifted-program reporting, counselor availability, chronic absenteeism. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Mariano Castro Elementary rank among elementary schools in Mountain View?
By Resource Investment Index, Mariano Castro Elementary ranks #9 of 10 elementary schools in Mountain View, 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 Mountain View on the city page.
What other schools are in Mountain View Whisman?
Besides Mariano Castro Elementary, Mountain View Whisman also operates Isaac Newton Graham Middle (860 students), Crittenden Middle (616 students), and Stevenson Elementary (461 students). See the Mountain View Whisman district page for the complete list.