The top reported proficiency rate is 57% in Science. The lowest is 42% in Math.
Original Research by School Decision on Arco Iris Spanish Immersion School
Arco Iris Spanish Immersion School is a charter school inside the Beaverton School District, serving kindergarten through eighth grade with a full Spanish immersion model. The school sits in Beaverton, a mid-sized city in the Tualatin Valley that functions as both an economic hub for Washington County and a residential suburb of Portland. The area is known for its concentration of technology companies, often called the Silicon Forest, and as the home of Nike’s global headquarters. The surrounding community offers a downtown core with a farmer’s market, food cart pods, a performing arts center, and multiple MAX Light Rail stations that connect the city to the broader Portland metro area. Much of Beaverton is developed as suburban residential neighborhoods, but transit-oriented development around the light rail lines has brought mixed-use projects, including the Round development that houses city hall, retail, and condominiums.
For families considering this school, the academic picture combines notable strengths with some important gaps in available data. In the most recent state assessments, students in grades three, four, and five posted proficiency rates in math and English language arts that varied by grade level. Overall across all tested subjects and grades, the school’s proficiency index places it among the higher-performing schools relative to districts in Washington County. That kind of showing is a clear strength for a charter school that dedicates a substantial portion of each day to instruction in a second language. Science results for fifth grade are available and show a solid level of achievement. State testing results for grades six through eight were not reported, so a parent with a child entering those grades will want to ask the school directly how they measure academic progress at that level. Because this is a K–8 school, there is no high school graduation rate to report.
The student body reflects the school’s immersion focus and its location. Hispanic and White students each make up a substantial share of enrollment, with a smaller but noticeable group of students who identify as two or more races. A very small share of students qualify for free or reduced-price lunch, which suggests a relatively affluent family base compared with many public schools in the county. The school’s charter status means families must apply and lottery in, and the low poverty rate likely reflects a degree of self-selection by households that actively seek out the immersion program. The school also has a modest enrollment for a K–8 school, which allows for a more intimate setting than many of the larger elementary and middle schools in the district.
The housing market in the school’s zip code is expensive, typical of the western Portland suburbs. Home values have been high and rents are similarly elevated. A family considering this school should be prepared for the cost of living in the area, though the district itself draws from a wide range of neighborhoods.
Within the district, a notable recent change was the opening of Tumwater Middle School in 2021, which altered some feeder patterns for families in Beaverton, but Arco Iris operates its own middle grades and so is not directly affected by that shift. The school functions as its own program within the district, retaining the immersion curriculum through eighth grade so that students can develop bilingual fluency over many years.
Overall, Arco Iris Spanish Immersion School is a good fit for families who value deep language immersion and want a K–8 pathway that avoids a transition to a separate middle school. The academic record in the elementary grades is strong, especially given the demands of learning in two languages. The missing test data for middle school grades is a reasonable thing to follow up on with the school directly. The school’s charter structure and low poverty rate mean that the student peer environment is relatively homogeneous, which is a characteristic worth noting simply as a fact of the school’s composition. For parents seeking a language-focused program with a proven track record in the earlier grades, this school is a compelling option in the Beaverton area.
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