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Email BoardMariano Castro Elementary
500 Toft Street, Mountain View, CA 94041-1727
Summary
Mariano Castro Elementary is badly underperforming.
Reading and math results average to the 12th percentile among comparable California schools.
Only 21.4% of students met California's reading standard, but it is trending up slightly.
Math is weaker: 20.4% of students met California's math standard, but it is trending up.
Proficiency stats
| Current Reading Proficiency | 21.4% |
| Current Math Proficiency | 20.4% |
| Reading State Rank | 4,293/4,657 (8th percentile) |
| Math State Rank | 3,925/4,657 (16th percentile) |
School information
| Student / Teacher Ratio | 17:1 |
| Student enrollment (2024–25) | 248 |
| Low-Income Students | 205 (82.7%) |
| English Learners | 165 (66.5%) |
School Website
Great Schools
Niche
Ed-Data
CAASPP| Admissions | Open enrollment |
|---|---|
| Charter school | No |
| Magnet school | No |
Test score trends
Reading rose 6.3 points from last year and rose 0.8 points over the full period. Math rose 5.7 points from last year and rose 6.6 points over the full period.
•Math +6.6 percentage points (2024–2026)Reading Proficiency Scores
2026 state test results
Race and Ethnicity
Only one group has a reportable reading result.
Distribution of Scores by Grade
The share meeting the reading standard ranges from 14.7% to 28.6% across the grades shown. Overall, the school’s reading results rank No. 4,293 of 4,657 among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
The 38.1-point reading income gap is nearly twice as wide as the 19.8-point gap at a typical California K–5 school. It widened over the period shown.
•English Learners vs English Native
3.9% of English learners meet the reading standard, compared with 50.0% of English-only students. The gap widened as English-learner results fell and English-only results rose.
•Math Proficiency Scores
2026 state test results
Race and Ethnicity
Only one group has a reportable math result.
Distribution of Scores by Grade
The share meeting the math standard ranges from 16.3% to 22.9% across the grades shown. Overall, the school’s math results rank No. 3,925 of 4,657 among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
The 25.5-point math income gap is wider than the 20.0-point gap at a typical California K–5 school. It widened over the period shown.
•English Learners vs English Native
6.4% of English learners meet the math standard, compared with 42.9% of English-only students. The gap widened as English-learner results rose and English-only results rose.
•Progress as students move up
2023–2026
How we compare income gaps
“Typical” means the median gap across 1,832 schools for reading and 1,839 for math. The comparison uses 2026 California K–5 schools with at least 20 tested students in each income group and a reported low-income student population. Each school counts once. Its gap is non-low-income proficiency minus low-income proficiency, including negative gaps. California state test data
Understanding this school
How does Mariano Castro Elementary compare within the district?
Mariano Castro Elementary is No. 8 in both reading and math proficiency among the 8 K–5 schools in Mountain View Whisman with 2026 results.
Explore the district’s schoolsHow does Mariano Castro Elementary rank in California?
Mariano Castro Elementary ranks No. 4,293 of 4,657 in reading and No. 3,925 of 4,657 in math for 2026. These proficiency rankings compare California schools in the same grade-level category.
How do low-income students at Mariano Castro Elementary compare within the district?
Low-income students here rank No. 7 in reading and No. 6 in math among 7 K–5 district schools with reportable 2026 results for this group. 14.3% meet the reading standard and 15.4% meet the math standard.
See results by student groupHow does Mariano Castro Elementary compare with other schools in Mountain View?
Mariano Castro Elementary is No. 8 in both reading and math proficiency among the 8 K–5 schools in Mountain View with 2026 results.
Explore schools in Mountain ViewHow does Mariano Castro Elementary compare with other schools in Santa Clara County?
Mariano Castro Elementary is No. 142 in both reading and math proficiency among the 153 K–5 schools in Santa Clara County with 2026 results.
Explore schools in Santa Clara CountyWhich schools should I compare?
Schools serving K–5 in the same district.
| School | Math | Reading |
|---|---|---|
| Mariano Castro ElementaryThis school | 20.4% | 21.4% |
| Amy Imai Elementary | 86.7% | 85.6% |
| Benjamin Bubb Elementary | 75.6% | 74.1% |
