Summary:
ZIP code 92880 has 10 schools—six elementary, three middle and one high school—all in Corona-Norco Unified. Across the list, average proficiency is 63% in ELA, 54% in math and 44% in science, above state results by 14, 16 and 8 percentage points, respectively. But those averages hide large differences between schools: the most important finding for families is that school-by-school results vary sharply, especially among middle schools.
Eleanor Roosevelt High has the highest all-grades ELA and science results, at 74% and 58%. Clara Barton Elementary leads elementary schools in all three subjects, with 70% in ELA, 66% in math and 53% in science; Philistine Rondo School of Discovery is close behind in math at 65%. Among middle schools, Dr. Augustine Ramirez Intermediate leads with 69% in ELA, 56% in math and 55% in science. At the other end, Auburndale Intermediate scores 39%, 19% and 18%, respectively—below the state in every subject. Ramirez’s results are 30, 36 and 37 percentage points higher than Auburndale’s.
Recent changes are mixed: average math scores rose by 2 percentage points from 2024–25 to 2025–26, while ELA was essentially flat and science rose by 1 point, less than the state’s 3-point increase. SchoolDigger rankings improved from 2023–24 to 2025–26 at Roosevelt, Ramirez, Rondo, River Heights, Barton and Eastvale; they declined at Reagan, Harada and Rosa Parks, while Auburndale ended at the 28th percentile, where it began. Context also differs: student-teacher ratios range from 21.0 at Auburndale to 28.5 at Barton, and all 10 schools report free/reduced lunch eligible figures for 2024–25, ranging from 53% at Rondo to 89% at Auburndale. These are useful context for comparing schools, not explanations of their results.
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