Each level is scored on its own scale — elementary, middle, and high are never ranked against each other.
The elementary years
The elementary schools average 66.1/100 — 27.2 points above the state average, with 9 of 9 in the Strong band.
9 elementary schools span 21 points around an average of 66.1.
Maple Hill Elementary (76/100) holds the Strong band — 60.6% of its students exceed the state standard, against a level average of 48.5%. 3 schools here rank as Growth Engines — returning cohorts gaining more than most schools statewide.
What these numbers can't see: class sizes, arts, teacher turnover, how a hallway feels at 8 a.m. Strong scores are the start of the question, not the answer.
The middle years
The middle schools average 78.6/100 — 40.0 points above the state average, with 3 of 3 in the Strong band.
3 middle schools span 15 points around an average of 78.6.
Chaparral Middle (85/100) holds the Strong band — 58.3% of its students exceed the state standard, against a level average of 52.3%. 1 school here ranks as a Growth Engine — returning cohorts gaining more than most schools statewide.
Only 3 campuses at this level — one school's year moves every number in this chapter.
The high school years
Consistently strong: all 2 high schools land within 3 points of each other, averaging 80.8/100 — 26.8 points above the state average.
All 2 high schools land within 3 points — the average is a fair summary here.
Diamond Bar High (82/100) holds the Strong band — 46.3% of its students exceed the state standard, against a level average of 46.6%. 2 schools classify as Strong All-Around — no weak dimension we measure.
Only 2 campuses at this level — one school's year moves every number in this chapter.
What it means for your family
Compare schools at your child’s level before deciding on an address. The strongest attendance-zone candidate is Maple Hill Elementary at 76/100 — confirm the exact boundary with the district before the house.
No charters or magnets among the ranked schools here, so the main lever is an intra-district transfer — California districts run them on their own windows and criteria. If your zoned school sits low in the appendix below, ask the district office for this year's dates.
A band is a position, not a prophecy — 4 campuses here rank as Growth Engine, their returning cohorts gaining more than most schools statewide. Ask your school two questions: what happens for a kid who arrives behind, and what the classroom looks like for one who arrives ahead.
The strongest-scoring run through the district:
Maple Hill Elementary 97th percentile · StrongScope Score 76/100Chaparral Middle 99th percentile · StrongScope Score 85/100Diamond Bar High 96th percentile · StrongScope Score 82/100
Top scorers at each level — not necessarily one zoned sequence. Confirm feeder patterns and enrollment zones with the district, and visit before you decide.
What this page can't see: whether a campus feels safe and glad at 8 a.m. If a path above looks workable, the next step is a visit.