Winterhaven School vs Portland Arthur Academy Charter School

Winterhaven School and Portland Arthur Academy Charter School sit 3.5 miles apart in Portland, Oregon, and both rank among the top 40 schools in the state — but they are not equal. Winterhaven School earns a 9.4/10 overall rating and holds the #25 state rank out of 1,226 Oregon schools, while Portland Arthur Academy Charter School rates 9.2/10 and ranks #37 of 1,226. That 0.2-point gap is narrow in the abstract, but the underlying academic data tells a sharper story.

On academics, the separation is concrete: Winterhaven School scores a perfect 10.0/10 in academic achievement versus Portland Arthur Academy Charter School's 9.3/10 — a 0.7-point difference. Growth scores follow the same direction, with Winterhaven School at 9.6/10 against Portland Arthur Academy Charter School's 9.0/10, a 0.6-point delta. Families who prioritize measured academic output and demonstrated student growth will find Winterhaven's numbers consistently stronger across both dimensions.

The two schools diverge meaningfully on size and equity indicators. Winterhaven School enrolls 315 students to Portland Arthur Academy Charter School's 164, nearly double the headcount. Portland Arthur Academy serves a slightly higher proportion of economically disadvantaged students — 30% qualify for free or reduced-price lunch compared to 23% at Winterhaven School. The student-teacher ratio also flips the advantage: Portland Arthur Academy Charter School offers 16.4 students per teacher against Winterhaven School's 19.7:1, giving the smaller charter school a tighter classroom environment despite its lower enrollment-driven resources.

One structural difference shapes the long-term decision directly: Winterhaven School serves grades KG–08, carrying students through middle school, while Portland Arthur Academy Charter School is a KG–05 program only. Families choosing Portland Arthur Academy will need a separate middle school plan at fifth grade. Winterhaven School, a regular public school, removes that transition entirely. Portland Arthur Academy Charter School's charter status also means enrollment typically requires an application or lottery process, unlike direct-enrollment at Winterhaven.