Summary:
ZIP code 91739 has three middle schools—Day Creek Intermediate, Etiwanda Intermediate and Summit Intermediate—all serving grades 6–8 in the Etiwanda Elementary District. Their 2025–26 average proficiency was above the state in every subject: 70% in ELA, 59% in math and 48% in science, compared with state results of 49%, 38% and 36%. But those averages hide a clear leader: Day Creek leads the other two schools across all three subjects.
Day Creek stands out with 81% proficiency in ELA, 74% in math and 65% in science. It leads Summit, the next-highest school, by 13 points in ELA, 20 in math and 25 in science. Etiwanda is lowest in all three subjects, at 62% in ELA, 48% in math and 40% in science. Summit is generally second, though its science result of 40.3% is just 0.3 points above Etiwanda’s 40.0%. All three schools are above the state in each subject, but Summit and Etiwanda have only about a 4-point science advantage.
Results have not risen consistently: the area’s average advantage over the state narrowed by 2 points in ELA and math and 1 point in science between the two years. Day Creek gained 1 point in math and 5 in science but fell 1 in ELA; Summit improved in science while edging down in ELA and math, and Etiwanda declined in all three. SchoolDigger’s 2025–26 rankings also place Day Creek highest at the 97th percentile, followed by Summit at the 84th and Etiwanda at the 78th. For context, all report free/reduced lunch eligible figures for 2024–25: 20% at Day Creek, 26% at Summit and 33% at Etiwanda; these are observations, not explanations for score differences.
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