The top reported proficiency rate is 31% in Math. The lowest is 4% in Science.
Original Research by School Decision on Union Hill El
Union Hill Elementary sits on Gulf Way in Round Rock, a fast-growing suburban city north of Austin anchored by Dell Technologies and a broad mix of manufacturers, healthcare systems, and retail employers. The school serves prekindergarten through fifth grade within Round Rock ISD, one of the larger districts in Williamson County.
The student body is a majority-Hispanic community, with substantial shares of Black and white students and smaller Asian and multiracial populations. A large majority of students qualify for free or reduced-price lunch, placing this school at the higher end of economic need within its setting. English learner and special education rates were not available in the data provided.
State assessment results from the most recent year tell a sobering story. On Texas's STAAR exams, roughly three in five students reached the "approaches grade level" threshold across all tested subjects combined, which is the lowest of three passing bars. The share meeting the middle standard, "meets grade level," was well below that, and only a small fraction reached the highest tier, "masters grade level." Looking at individual subjects, ELA approaches-grade-level rates were somewhat stronger than math, while science proficiency at fifth grade was very low. Social studies results were also weak across all three tiers. Placed against districts in Williamson County, Union Hill's overall proficiency index sits in the bottom quartile of that group. Only one year of data is available here, so no trend direction can be determined. Parents who want to understand what the school is doing to move these numbers would be well-served asking directly.
A note on the grade-level breakdowns: proficiency rates at third and fourth grade in math were withheld, likely because tested group sizes were too small to report under state privacy rules. The fifth-grade English STAAR math result was available and showed fewer than a third of students reaching proficiency. In ELA, the fourth-grade group was tested entirely on the Spanish-language STAAR, and none of those students reached proficiency; that result is worth a direct conversation with the school given how small and specific that cohort is.
The broader district context adds a few things worth knowing. Round Rock ISD voters approved three of four bond propositions in late 2024, publicly reported as funding repairs to aging HVAC, roofing, electrical, and plumbing systems across schools, along with technology, fine arts upgrades, and a new Career and Technical Education facility. The stadium proposition did not pass. The district also adopted the state's Bluebonnet Learning math curriculum for elementary grades but, as of early 2025, publicly reported that it had not adopted the reading and language arts version of that curriculum, which contains Bible- and Christianity-based content, forming a committee to evaluate it instead. Parents for whom curriculum philosophy matters will want to follow that process. The district also proposed bus route cuts for 2026-27 before pausing those changes in spring 2026 under family pressure, committing to keep current service for the coming year while forming a parent advisory committee.
On housing, the zip code around Union Hill shows home values modestly above the Texas statewide median but below the national figure, with values having declined year-over-year. Rents have held roughly flat. The estimated monthly cost of ownership at current mortgage rates is substantially higher than renting, a gap that is relevant for families weighing a move into the attendance zone. Round Rock itself is one of the faster-growing cities in Texas, with a large mixed-use development at the I-35 and SH 45 interchange having broken ground in early 2025.
Union Hill Elementary is a neighborhood school in a genuinely diverse, predominantly lower-income community within a large suburban district. The academic results as currently reported are below the county norm by a meaningful margin, and a parent with academic performance as a primary criterion will want to press the school for its specific intervention and support plan.
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