The top reported proficiency rate is 62% in English language arts. The lowest is 40% in Science.
Original Research by School Decision on Mambrino School
Mambrino School sits along Mambrino Highway on the outskirts of Granbury, serving prekindergarten through fifth grade as part of Granbury ISD. It is a mid-to-large elementary school for its grade band, drawing from a community that is growing quickly and where families are arriving in steady numbers.
The school's enrollment is majority white, with a meaningful share of Hispanic students and smaller numbers of other groups. Roughly half of students qualify for free or reduced-price lunch, meaning the school serves a genuinely mixed economic population. Data on English learners and students with IEPs were not available in the records we reviewed, so families whose children need those services should ask the school directly about capacity and staffing.
On the Texas STAAR assessment, Mambrino's academic performance is the clearest available signal of how students are doing. Looking across grades three through five, reading and language arts results are the relative strength: fourth graders posted particularly solid proficiency, and third and fifth grades came in at a middling range. Math proficiency across those same grades runs lower, with third and fifth grade results in the lower-to-mid range and fourth grade performing better. Fifth grade science proficiency was the lowest result of any subject tested, which is worth asking the school about. Taking all tested subjects and grades together, Mambrino lands in the top quartile for overall proficiency relative to other districts in Hood County, which is a meaningful position among its local peers.
The STAAR also reports performance at different threshold levels. A substantial share of students are reaching the "approaches" standard across subjects, somewhat fewer are clearing the higher "meets" bar, and the share reaching "masters" level is modest. Trend data covers only the most recent year, so it is not possible to say whether results are improving or holding steady. A parent who wants to understand trajectory should ask the school directly.
Granbury itself is the county seat and principal city of Hood County, located southwest of Fort Worth and centered on a restored nineteenth-century courthouse square with locally owned shops, galleries, and restaurants. Publicly reported sources describe it as one of the faster-growing small cities in the region, with substantial new residential construction across multiple subdivisions, a large mixed-use lakefront development underway near the Brazos River, and a population that has been rising consistently in recent years. The area's major employers are anchored by Lake Granbury Medical Center, Hood County government, and large retailers. The community has a small-town, event-driven character with an active outdoor trail network connecting parks and civic institutions.
Housing near the school sits at values modestly above the Texas statewide benchmark and below the national median. Home values have been essentially flat year over year, while rents have ticked upward slightly. Estimated monthly mortgage costs run at a level that may stretch moderate incomes, though rent-to-income ratios are in a manageable range relative to national norms.
At the district level, two items stand out for families. Voters approved a tax rate election in late 2023 that funds pay raises for teachers, smaller class sizes, and additional campus security, changes that should affect day-to-day classroom conditions. At the same time, a bond measure that would have funded a new elementary school and renovations across nine campuses was rejected in May 2024, the third failed bond in recent years. That means capital improvement needs remain unaddressed at a time when the district is absorbing population growth, and families thinking about facility conditions or long-term capacity should factor that in. Separately, the district was involved in a publicly reported library book review process beginning in early 2022 that drew a federal inquiry; most removed books were subsequently returned. Families with strong feelings about library access and curriculum culture may want to explore how that process has evolved.
AP and dual-credit pathways do not apply here; Mambrino is an elementary school. A graduation rate is similarly not applicable at this level.
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