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Email BoardKatherine Elementary
5455 Katherine Street, Simi Valley, CA 93063-4556
Summary
Katherine Elementary is underperforming.
Reading and math results average to the 56th percentile among comparable California schools.
Only 47.0% of students met California's reading standard, and it is trending down slightly.
Math is weaker: 42.4% of students met California's math standard, it is holding steady.
Proficiency stats
| Current Reading Proficiency | 47.0% |
| Current Math Proficiency | 42.4% |
| Reading State Rank | 2,080/4,657 (55th percentile) |
| Math State Rank | 2,020/4,657 (57th percentile) |
School information
| Student / Teacher Ratio | 21:1 |
| Student enrollment (2024–25) | 300 |
| Low-Income Students | 159 (54.6%) |
| English Learners | 28 (9.6%) |
School Website
Great Schools
Niche
Ed-Data
CAASPP| Admissions | Open enrollment |
|---|---|
| Charter school | No |
| Magnet school | No |
Test score trends
Reading fell 2.6 points from last year and fell 3.0 points over the full period. Math rose 1.6 points from last year and rose 0.1 points over the full period.
•Math +0.1 percentage points (2024–2026)
Reading Proficiency Scores
2026 state test results
Race and Ethnicity
White and Hispanic or Latino students have the strongest results.
Distribution of Scores by Grade
The share meeting the reading standard ranges from 42.0% to 54.2% across the grades shown. Overall, the school’s reading results rank in the top 45% among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
The 17.7-point reading income gap is narrower than the 19.8-point gap at a typical California K–5 school. It widened slightly over the period shown.
•English Learners vs English Native
9.1% of English learners meet the reading standard, compared with 46.7% of English-only students. The gap widened as English-learner results fell and English-only results fell.
•Math Proficiency Scores
2026 state test results
Race and Ethnicity
White students have the strongest math results at about 53% proficiency. The other reported groups range from about 31% to 31%.
Distribution of Scores by Grade
The share meeting the math standard ranges from 39.6% to 46.0% across the grades shown. Overall, the school’s math results rank in the top 44% among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
The 28.9-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
18.2% of English learners meet the math standard, compared with 43.9% of English-only students. The gap widened as English-learner results fell and English-only results fell.
•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 Katherine Elementary compare within the district?
Katherine Elementary is No. 10 in reading and No. 8 in math proficiency among the 18 K–5 schools in Simi Valley Unified with 2026 results.
Explore the district’s schoolsHow does Katherine Elementary rank in California?
Katherine Elementary ranks No. 2,080 of 4,657 in reading and No. 2,020 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 Katherine Elementary compare within the district?
Low-income students here rank No. 11 in both subjects among 18 K–5 district schools with reportable 2026 results for this group. 39.2% meet the reading standard and 29.7% meet the math standard.
See results by student groupHow does Katherine Elementary compare with other schools in Simi Valley?
Katherine Elementary is No. 10 in reading and No. 8 in math proficiency among the 18 K–5 schools in Simi Valley with 2026 results.
Explore schools in Simi ValleyHow does Katherine Elementary compare with other schools in Ventura County?
Katherine Elementary is No. 43 in reading and No. 38 in math proficiency among the 91 K–5 schools in Ventura County with 2026 results.
Explore schools in Ventura CountyWhich schools should I compare?
Schools serving K–5 in the same district.
| School | Math | Reading |
|---|---|---|
| Katherine ElementaryThis school | 42.4% | 47.0% |
| Arroyo Elementary | 23.3% | 29.9% |
| Atherwood Elementary | 36.2% | 44.3% |
