Sebastian Questa Elementary
Mountain House, CA · Middle School
Sebastian Questa Elementary is a middle school in Mountain House, CA with 910 students enrolled and a 75% proficiency rate. Part of Lammersville Joint Unified. NCES data from the U.S. Department of Education.
Sebastian Questa Elementary is a middle school in Mountain House, CA with 910 students enrolled. It is part of the Lammersville Joint Unified. That headcount is below the 940-student average for schools in the district.
On the latest EDFacts assessments, 75% of students reached grade-level proficiency in combined math and reading — a rate near the top of the national distribution. That is 9 points above the 67% average for the Lammersville Joint Unified. Against the 45% California statewide average, the school sits 30 points higher.
Over the last three reported years the district proficiency rate this school inherits has risen by about 26 points.
The student-teacher ratio is 23.3 to 1, above the U.S. average of roughly 16 to 1. A relatively low 10% of students qualify for free or reduced-price lunch.
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About This School
Sebastian Questa Elementary is a middle school located in Mountain House, California. The school serves 910 students. The student-to-teacher ratio is 23.3:1.
According to EDFacts assessment data, 75% of students meet grade-level proficiency standards in combined math and reading.
10% of students qualify for free or reduced-price lunch.
Sebastian Questa Elementary is part of the Lammersville Joint Unified in California.
How This School Compares
Sebastian Questa Elementary has 910 students enrolled, making it smaller than the average school in Lammersville Joint Unified (940 students). Its 75% proficiency rate is 9 percentage points above the district average of 67%. Compared to the California state average of 45%, the school performs 30 points higher. The 23.3:1 student-teacher ratio is above the national average of 16:1.
Frequently Asked Questions
Sebastian Questa Elementary has 910 students enrolled. The student-to-teacher ratio is 23.3:1.
According to EDFacts data, 75% of students at Sebastian Questa Elementary meet grade-level proficiency standards in combined math and reading assessments.
Sebastian Questa Elementary is part of the Lammersville Joint Unified in Mountain House, 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.
Source: NCES Common Core of Data, 2026.