Summary:
Rosemead, California, has 15 listed schools—11 elementary, three middle and one high school—with results spanning elementary through high school grades. In 2025–26, the average across schools was above California’s in all three subjects: 54% in English language arts (ELA) versus 49% statewide, 51% in mathematics versus 38%, and 40% in science versus 36%. Mathematics had the strongest average advantage, but results vary sharply from school to school: depending on the subject, the top-to-bottom gap is about 36 to 41 percentage points. The most important takeaway is that an area-wide average can hide major differences between schools.
Rosemead High and Potrero Heights are nearly tied for the top ELA result, at 74.6% and 74.4%; Duff Language Magnet Academy leads mathematics at 76%, seven points ahead of Potrero Heights, while Potrero leads science at 59%, eight points ahead of Mildred B. Janson. At the other end, Sanchez is lowest in all three subjects: 33% in ELA, 35% in mathematics and 23% in science. Those results are below state figures by 16, three and 13 points, respectively. Grade-level results add useful distinctions: Muscatel Middle led the three middle schools in grade 8 ELA, math and science, while Rosemead High’s grade 11 results topped state figures in all three subjects; its grade 12 science result, 18% versus 33% statewide, was a notable exception.
Recent changes are mixed rather than consistently upward: the school average fell by two points in ELA from 2024–25 to 2025–26, was nearly unchanged in mathematics, and rose by four points in science. Longer-term SchoolDigger rankings also diverged: Bitely rose 12 statewide percentile points from 2023–24 to 2025–26, while Sanchez fell 24 and Willard fell 15. Reported free/reduced lunch eligible shares in 2024–25 provide context, not an explanation: Potrero Heights was at 58%, compared with 81% at Duff and 86% at Rosemead High, despite strong results at all three. The schools serve different grade spans, so all-grades comparisons are not fully like-for-like.
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