Best Middle Schools in Zip Code 91423

Middle schools in ZIP code 91423 include two schools serving grades 6–8: Louis Armstrong Middle (1,174 students) and High Technical LA Middle (250 students). Their 2025–26 average proficiency is close to the state in English language arts (ELA) and science, but below it in math. The most important distinction is that Armstrong leads in all three subjects and is above the state in each, while High Technical LA is below the state in all three.

Louis Armstrong Middle stands out for proficiency: 55% in ELA, 41% in math and 42% in science, compared with 45%, 28% and 31% at High Technical LA Middle. Armstrong’s leads are 10 percentage points in ELA, 13 in math and 11 in science; its results are also 6, 3 and 6 points above state results, respectively. High Technical LA is 5 points below the state in ELA, 10 below in math and 5 below in science. The pattern is reversed for chronic absenteeism: High Technical LA’s rate is 4%, compared with 21% at Armstrong and 18% statewide.

Both schools’ proficiency improved from 2024–25 to 2025–26, with larger gains at High Technical LA: Armstrong rose 1 point in ELA, 2 in math and 1 in science; High Technical LA gained 6, 4 and 4 points. SchoolDigger ranks Armstrong at the 70th percentile with four stars, down from the 74th percentile in 2023–24; High Technical LA is at the 48th percentile with two stars, up from the 38th percentile. As context, in 2024–25, free/reduced lunch eligible students made up 63% of Armstrong’s enrollment and 77% of High Technical LA’s; student–teacher ratios were 21.7 and 22.6, respectively. These figures describe two schools and do not establish why their results differ.