Summary:
Zip code 91739 has five K–5 elementary schools, all in the Etiwanda Elementary district, serving 3,289 students altogether. Their 2025–2026 results are above California averages in all three subjects: the five-school averages are 69% in ELA, 67% in math, and 48% in science, versus state averages of 49%, 38%, and 36%. The most important difference for families is that strong results across the area do not mean schools perform equally, especially in science.
John L. Golden Elementary stands out, leading the schools in ELA (79%), math (79%), and science (70%); its science result is 30 percentage points above the lowest schools’ 40%. Grapeland Elementary ranks second in ELA (75%) and math (71%), but is tied for the lowest science result. At the other end, Windrows Elementary has the lowest ELA result (61%), while Perdew Elementary has the lowest math result (59%); both also score 40% in science. Etiwanda Colony Elementary is generally in the middle, with 71% in ELA, 65% in math, and 45% in science.
Recent averages show ELA improving by 2 percentage points and math by 1, while science fell by 4; the group’s lead over the state widened by 1 point in ELA, narrowed by 1 in math, and narrowed by 8 in science. Science declines were especially pronounced at Grapeland (down 15 points) and Colony (down 13). SchoolDigger gives Golden five stars and a 95th-percentile ranking; the other schools have four stars and rank from the 77th to 86th percentile. Golden is also the largest school, with 916 students, and has a 24.6 student-teacher ratio; Windrows has the lowest reported ratio, 21.8. The schools report free/reduced lunch eligible shares for 2024–2025 ranging from 19% at Golden to 38% at Perdew, with no simple match between those shares and achievement. These figures are context, not evidence that school size, ratios, or income measures explain results.
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