Oster Elementary
San Jose, CA · Elementary School
Oster Elementary is a elementary school in San Jose, CA with 638 students enrolled and a 75% proficiency rate. Part of Union Elementary. NCES data from the U.S. Department of Education.
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About This School
Oster Elementary is a elementary school located in San Jose, California. The school serves 638 students. The student-to-teacher ratio is 24.5:1.
According to EDFacts assessment data, 75% of students meet grade-level proficiency standards in combined math and reading.
9% of students qualify for free or reduced-price lunch.
Oster Elementary is part of the Union Elementary in California.
How This School Compares
Oster Elementary has 638 students enrolled, making it smaller than the average school in Union Elementary (669 students). Its 75% proficiency rate is 9 percentage points above the district average of 66%. Compared to the California state average of 45%, the school performs 30 points higher. The 24.5:1 student-teacher ratio is above the national average of 16:1.
Frequently Asked Questions
Oster Elementary has 638 students enrolled. The student-to-teacher ratio is 24.5:1.
According to EDFacts data, 75% of students at Oster Elementary meet grade-level proficiency standards in combined math and reading assessments.
Oster Elementary is part of the Union Elementary in San Jose, California. You can view all schools in this district on the district page.
All data on this page comes from the National Center for Education Statistics (NCES) Common Core of Data and EDFacts assessment results. These are official federal datasets published by the U.S. Department of Education.
School profiles are built from NCES directory data and EDFacts assessment results. Proficiency rates reflect combined math and reading performance. Graduation rates are reported for high schools with available data.
The this entity record above pulls directly from NCES Common Core of Data and EDFacts. What follows is the per-entity context — how this entity sits in the broader U.S. K-12 school outcomes and enrollment distribution and which underlying factors drive the headline numbers.
The methodology behind every numeric value on this page is publicly documented on the NCES Common Core of Data and EDFacts portal and described in detail on this site’s methodology page. Refresh cadence varies by underlying series; the page surfaces the as-of date for each number so readers can trace any figure back to the source release.
For readers using this page as a decision input, the related-entity pages elsewhere on the site provide the comparison set. The most useful comparison for this entity is typically a peer within U.S. public schools and districts with similar size, similar exposure, or similar geography — not the national-level summary alone.
Source: NCES Common Core of Data, 2026.