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Email BoardButterfield Charter
900 West Pioneer Avenue, Porterville, CA 93257-1240
Summary
Butterfield Charter is badly underperforming.
Reading and math results average to the 12th percentile among comparable California schools.
Only 25.9% of students met California's reading standard, but it is trending up.
Math is weaker: 2.4% of students met California's math standard, and it is trending down slightly.
Proficiency stats
| Current Reading Proficiency | 25.9% |
| Current Math Proficiency | 2.4% |
| Reading State Rank | 1,398/1,734 (19th percentile) |
| Math State Rank | 1,660/1,735 (4th percentile) |
School information
| Student / Teacher Ratio | 21:1 |
| Student enrollment (2024–25) | 504 |
| Low-Income Students | 474 (94.0%) |
| English Learners | 110 (21.8%) |
School Website
Great Schools
Niche
Ed-Data
CAASPP| Admissions | Open enrollment |
|---|---|
| Charter school | Yes |
| Magnet school | No |
Test score trends
Reading rose 11.8 points from last year and rose 8.1 points over the full period. Math fell 0.1 points from last year and fell 1.4 points over the full period. The latest results include grade 7, which was not included in the previous year.
•Math -1.4 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 21.4% to 40.0% across the grades shown. Overall, the school’s reading results rank No. 1,398 of 1,734 among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
The 22.0-point reading income gap is wider than the 7.9-point gap at a typical California 1–12 school. It widened over the period shown.
•English Learners vs English Native
6.3% of English learners meet the reading standard, compared with 24.7% of English-only students. The gap narrowed as English-learner results rose and English-only results rose.
•Math Proficiency Scores
2026 state test results
Race and Ethnicity
Hispanic or Latino students have the strongest math results at about 3% proficiency. The other reported groups range from about 0% to 0%.
Distribution of Scores by Grade
The share meeting the math standard ranges from 1.6% to 10.0% across the grades shown. Overall, the school’s math results rank No. 1,660 of 1,735 among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
Low-income students trail other students by 5.7 points in math. It narrowed over the period shown.
•English Learners vs English Native
0.0% of English learners meet the math standard, compared with 2.1% of English-only students. The gap narrowed as English-learner results held steady and English-only results fell.
How we compare income gaps
“Typical” means the median gap across 6 schools for reading and 6 for math. The comparison uses 2026 California 1–12 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 Butterfield Charter rank in California?
Butterfield Charter ranks No. 1,398 of 1,734 in reading and No. 1,660 of 1,735 in math for 2026. These proficiency rankings compare California schools in the same grade-level category.
