Summary:
Seven schools serving grades K–12 are located in zip code 95215, across Stockton Unified, Linden Unified and Escalon Unified. Their 2025–26 all-grades results average 34% proficient in ELA, 22% in math and 24% in science, compared with state results of 49%, 38% and 36%. The most important takeaway is how much results differ from school to school, even among students in the same grade.
Glenwood Elementary leads in all-grades ELA and math, with 45% and 37% proficient; Collegeville Elementary leads in science at 37%, the only school above the state’s 36%. At the other end, Wilhelmina Henry Elementary has the lowest ELA and science results, at 17% and 7%, while Franklin High has the lowest math result, at 9%. Fifth-grade results also show a wide spread: ELA ranges from 12% at Henry to 57% at Glenwood, and math from 2% to 47%; Collegeville leads fifth-grade science at 37%.
Results improved on average from 2024–25 to 2025–26 in ELA by 3 percentage points and science by 9, outpacing state gains; math rose by just 1 point, less than the state’s 1-point increase. Elmwood Elementary improved in all three subjects, while Henry declined in all three. SchoolDigger’s rankings also moved in different directions: Glenwood rose from the 40th to the 52nd percentile, while Henry fell from the 8th to the 3rd. As context, all seven schools reported the free/reduced lunch eligible measure for 2024–25; shares ranged from Waterloo’s 65% to Glenwood’s 87%. These figures describe school context, not a reason for the test results.
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