Summary:
ZIP code 91724 has five schools: three elementary schools, one middle school, and one high school, serving students across elementary, middle, and high school grades. Results vary by subject and school: Royal Oak Middle leads in ELA and math, while Charter Oak High leads in science. All-grades results combine different grade spans, so they are not perfectly like-for-like comparisons. The clearest shared shortfall is science: the five-school average was 31% proficient in 2025–26, 5 percentage points below the state’s 36%, and four of the five schools fell below the state.
Royal Oak Middle is the strongest overall test-score standout, with 58% proficient in ELA and 47% in math—about 8 points above the state in each subject. Charter Oak High leads science at 38%, about 2 points above the state, but has the lowest math result at 28%, 10 points below the state. Glen Oak Elementary leads the elementary schools in all-grades ELA, math, and science; Cedargrove Elementary is lowest in ELA and science, at 42% and 24%. Charter Oak’s completion results offer a different perspective: its graduation rate was 100%, compared with 88% statewide.
Area averages improved from 2024–25 to 2025–26 in all three subjects, with science up 6 points, math up 3, and ELA up 2, but school trends were uneven. Glen Oak’s science result rose 19 points, while Cedargrove’s fell 10; Charter Oak High’s ELA result declined 5 points. SchoolDigger’s statewide percentile rankings rose from 69th to 72nd for Royal Oak and 54th to 60th for Glen Oak, while Cedargrove fell from 58th to 47th. All five schools reported free/reduced lunch eligible shares for 2024–25, ranging from 70% at Charter Oak High to 77% at Cedargrove; reported student-teacher ratios ranged from 21 to 24.7. These figures provide context, but they do not sort neatly by achievement.
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