The top reported proficiency rate is 30% in English language arts. The lowest is 17% in Math.
Original Research by School Decision on Riverdale Elementary School
Riverdale Elementary School, a regular public school serving preschool through fifth grade, sits within the Adams 12 Five Star Schools district in Thornton, a large suburban city north of Denver. Thornton originated as a planned community on former farmland and has transformed into one of Colorado’s most populous cities, with a landscape of single-family neighborhoods, shopping centers such as Larkridge Mall, and an extensive network of parks and trails. The city does not have a traditional downtown core; civic facilities, libraries, and school campuses are distributed across the suburban expanse. Thornton’s population has grown rapidly over recent decades, and the city completed a Housing Needs Assessment in 2024, signaling continued planning for residential expansion. Commuter rail service via RTD’s N Line arrived in 2020, adding a transit option in an otherwise car-dependent environment.
Riverdale Elementary enrolls nearly 400 students. The student body is diverse, with a majority of students identifying as Hispanic and a substantial share as White, along with smaller populations of Asian, Black, and multiracial students. More than two-thirds of students qualify for free or reduced-price lunch, placing the school in a higher-poverty context compared to many of its peers.
On the Colorado Measures of Academic Success assessments administered in the 2024–25 school year, Riverdale’s proficiency rates across tested subjects were below the 30 percent mark in reading and below a quarter in math and science. Specifically, about three in ten students met or exceeded the state’s proficiency bar in English language arts, while roughly half that share did so in math, and a similar level held for fifth-grade science. These are modest results in absolute terms. However, when placed against other districts in Adams County—a comparison set of thirteen districts, seven of which reported a composite proficiency index—Riverdale’s overall proficiency score landed above the midpoint. In other words, while the school’s raw percentages are low, they are not the lowest in the county, and the school performs somewhat better than the median of its county peers.
As an elementary school, Riverdale does not have a graduation rate or chronic absenteeism data that would apply to older grades. Information on special education and English learner populations was not available in the data reviewed, nor were discipline figures or staffing ratios. A parent seeking a fuller picture of student support services and class sizes may want to follow up directly with the school or district.
The housing market in the zip code served by Riverdale reflects Thornton’s growth pattern. Median home values and rents are slightly below the state average, and both have seen a modest year-over-year decline in the most recent data. National mortgage rates have been hovering in the mid-six percent range, and a typical household would face a sizable gap between estimated monthly mortgage costs and local rents, a common dynamic in many metro-area suburbs.
Riverdale is not a charter or magnet school. It is a neighborhood elementary school drawing from the surrounding residential areas of Thornton. For families considering this school, the key takeaway is that academic proficiency is below state averages but sits in the middle tier when compared within its own county. The school serves a high-needs population, and the Thornton area is continuing to grow, with a suburban character and limited walkability. A parent may want to investigate what academic interventions and enrichment programs are available, as well as how the school supports students who are learning English or have individualized education plans, information that was not captured in the available data.
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