Summary:
ZIP code 95673 has two middle schools, both serving grades 7–8 in Twin Rivers Unified, so their grade-level results can be compared directly. Across the schools, average proficiency is 45% in English language arts (ELA), 36% in math and 30% in science, below state results of 49%, 38% and 36%. Most importantly, Westside Preparatory Charter is above the state in ELA and math, while Rio Linda Preparatory Academy is below in both.
Westside stands out in ELA and math: its 2025–26 results are 52% in ELA and 41% in math, compared with Rio Linda’s 37% and 30%—gaps of 15 and 12 percentage points. Westside is 2 points above the state in ELA and 3 points above in math; Rio Linda is 12 and 9 points below. Science reverses that pattern: Rio Linda leads Westside, 33% to 28%, a 5-point difference, although both are below the state’s 36%. Across the two schools, science has the largest average shortfall from the state, at 6 points.
Recent changes are mixed: the schools’ average ELA gap from the state widened from 4 to 5 points between 2024–25 and 2025–26, while the math gap narrowed from 4 to 3 points and the science gap from 9 to 6 points. Westside’s math and science results rose by 6 and 5 points, while Rio Linda’s math fell by 1 point and its science rose by 7. SchoolDigger ranks Westside at the 63rd percentile in 2025–26, after 60th the prior year; Rio Linda is at the 44th percentile, down 2 points from 46th. Both have a SchoolDigger rating of 1 star and rank 691 of 968 in the district. Other differences are context, not explanations: Westside’s student–teacher ratio is 20.3 versus 20.0 at Rio Linda, and its 2024–25 free/reduced lunch-eligible share is 81% versus 88%. Chronic absenteeism is 32% at Westside and 43% at Rio Linda, compared with 18% statewide.
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