Summary:
ZIP code 92019 has two middle schools—Hillsdale Middle and Montgomery Middle—both serving grades 6–8 in the Cajon Valley Union district. Their results can be compared across the same grades: in 2025–2026, Hillsdale was above state proficiency rates in ELA, math and science, while Montgomery was below them in all three. The defining finding for this area is the large, consistent achievement gap between the two schools.
Hillsdale Middle stands out at the top: its proficiency rates were 57% in ELA, 45% in math and 44% in science, about 8, 7 and 9 percentage points above state rates. Montgomery Middle was at the bottom, with 19% proficient in ELA, 8% in math and 9% in science—about 31, 30 and 27 points below the state. Hillsdale’s lead over Montgomery was 38 points in ELA, 37 in math and 36 in science, with sizable gaps also present in each grade. Chronic absenteeism followed a similar pattern: 14% at Hillsdale versus 25% at Montgomery, an 11-point difference.
Across the two schools, average math proficiency rose 1 point from 2024–2025 to 2025–2026, and science rose 3 points, while ELA fell 1 point. Those averages conceal different school trends: Hillsdale improved in math and science, while Montgomery edged down in all three subjects. SchoolDigger’s rankings also show a persistent divide: Hillsdale was at the 74th percentile with 4 stars in 2025–2026, compared with Montgomery at the 4th percentile with 0 stars. Both schools reported a 22:1 student-teacher ratio for 2024–2025; their free/reduced lunch eligible figures that year were 73% at Hillsdale and 94% at Montgomery. These measures offer context, but they do not explain the score differences.
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