Summary:
ZIP code 55040 covers the Isanti/Cambridge area of Minnesota and contains 10 schools serving 1,823 students — 4 elementary, 2 middle, 3 high, and 1 alternative school — split between the Cambridge-Isanti Public School District, which ranks 228 of 458 statewide at the 50th percentile with 3 stars, and the much smaller Art and Science Academy district, ranked 366 of 458 at the 20th percentile with 1 star.
The academic standout is Cambridge-Isanti STEAM School, which posts the ZIP's highest all-grade math (47.8%) and reading (46.3%) proficiency, beats both its district and the state in math, and has the lowest free/reduced-lunch share at 23.74%. Isanti Middle School is comparatively steady, with all-grade reading (44.1%) above its district and 8th grade math (44.5%) and reading (50.7%) at or above the state. Isanti Intermediate School is the clearest sustained weakness: three straight 1-star years, all-grade reading at 31.4% versus the state's 48.6%, and 3rd grade reading at 26.3% against the state's 46.8%. Art & Science Academy Middle School has a sharp math gap — 18.5% all grade and just 7.1% in 8th grade — while its reading (41.8%) is comparatively stronger.
High school outcomes diverge sharply. Riverside Academy reports a 32.2% graduation rate and 25.8% dropout rate alongside 0% all-grade math in two recent years, while Riverside Academy IS reports an 83.3% graduation rate and a 0.0% dropout rate, though its test scores are suppressed. Free/reduced lunch averages about 33.5% in elementary and 33.7% in middle schools but about 62.8% in high schools and 69.23% at the alternative school, so outcomes should be read in that context. Science is the most consistent gap: every school with all-grade science data falls below the state's 25.5%, topping out at 18.2% at Cambridge-Isanti STEAM.
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