Original Research by School Decision on Arroyo High
Arroyo High sits on North Cedar Avenue in El Monte, a dense, working-class city in the San Gabriel Valley that is predominantly Hispanic with a substantial Asian population. The school serves grades nine through twelve as a regular public high school in the El Monte Union High School District. Its enrollment is large enough to support a full high school experience across all four grades, with classes distributed fairly evenly from freshman to senior year.
The student body reflects the community closely. The large majority of students are Hispanic, with Asian students making up a meaningful share. Nearly all students qualify for free or reduced-price lunch, which places the school among the highest-need settings in a county with many high-need schools. Data on English learner enrollment and students with IEPs were not available in what was provided, so parents with children in those categories would want to ask the school directly about those supports.
On state assessments, Arroyo shows a split picture across subjects. In English language arts, results are solidly above half the tested population meeting or exceeding standards, which is a genuine strength in a high-poverty setting. Math proficiency sits well below that, affecting a majority of students. Science proficiency is lower still, with fewer than a third of students reaching the standard. Because only one year of data is available, it is not possible to say whether these figures represent an improvement, a decline, or a stable trend. Parents who want to understand whether the school is gaining ground would do well to ask about recent year-over-year movement and which subgroups the school is focusing on.
No graduation rate data was available for Arroyo in what was provided, and the school's standing relative to other districts in Los Angeles County could not be calculated from the available figures. These are meaningful gaps for a family trying to understand the full arc of a student's experience here.
The district's publicly reported curriculum development is worth knowing. El Monte Union High has built out its own ethnic studies curriculum, described as reaching TK through twelfth grade and including licensed indigenous art, poetry, and oral histories. A district teacher co-led the AVID college-readiness program alongside this work. California now requires ethnic studies for graduation, and the district's early, locally developed approach to that requirement is a real differentiator worth asking the school about in terms of how it is implemented at Arroyo specifically. No broader program offerings data, such as AP course access, dual enrollment, or career pathways, was available for Arroyo directly.
El Monte itself gives Arroyo students a particular kind of community context. The city is compact and mixed-use, with residential neighborhoods threaded through retail and industrial corridors. Its economic base runs through the school district itself, a nationally ranked Toyota dealership, distribution and manufacturing firms, and regional banking operations. Downtown along Main Street and Valley Boulevard is walkable and anchored by local restaurants and a weekly farmers market. The city is pursuing transit-oriented development at a large mixed-use district adjacent to its major transit station, one of the busiest in the western United States, giving students who commute by bus or train relatively strong regional access.
Housing near the school is priced well above the national median and is roughly in line with California's statewide level, though it has seen modest year-over-year appreciation. Estimated monthly ownership costs run substantially higher than rental costs, and rent itself consumes a large share of a typical household's income. The affordability picture is tight by most measures, which tracks with the school's high rate of economic need among students.
For a family weighing Arroyo, the school's ELA performance stands out in a difficult-to-serve environment, while math and science results point to areas where a student may need additional preparation or supplemental support, and a parent may want to ask the school specifically what intervention resources exist in those subjects.
See more original research from School Decision →