ExploreMapCompareBlogSign in

Elementary Schools in Diamond Bar, California

Above Average2024–25 data9 schools · avg 70.0/100

Diamond Bar, California has 9 ranked elementary schools with an average Scope Score of 70.0/100 — 26.2 points above the California state average of 43.8. The highest-scoring school is Chaparral Middle at 86/100, where 58.3% of students exceed the state standard on the 2025 CAASPP assessment. Diamond Bar schools average 44.5% exceeded standard (state: 21.6%) — this exceeded-vs-met distinction reveals whether schools push students beyond proficiency or pace toward it. Of 9 schools, 4 High Ceiling stand out for their performance profiles. Chronic absenteeism averages 9.0% (below the state average of 18.1%). Data source: California Department of Education CAASPP 2025, analyzed by SchoolScope.

Avg Scope Score
70.0
State avg: 43.8
SchoolScope composite
Score Range
45.8
40.2 – 86.0
Avg Exceeded %
44.5%
State avg: 21.6%
CDE CAASPP 2025
Chronic Absenteeism
9.0%
State avg: 18.1%
CDE Attendance 2025
Schools Ranked
9
With Scope Scores

How Diamond Bar schools compare

Diamond Bar's 9 ranked elementary schools average a Scope Score of 70.0 — 26.2 points above the California state average of 43.8. Scores range from 40.2 to 86.0, a 45.8-point spread.

The top-ranked school is Chaparral Middle with a Scope Score of 86 and 58.3% of students exceeding standard.

High-ceiling schools: Diamond Bar schools average 44.5% exceeding standard — well above the statewide average of 21.6%. These schools aren't just getting students to proficiency, they're pushing them further.

Chronic absenteeism in Diamond Bar averages 9.0%, which is above the state average of 18.1%.

How we score · Scope Score weights exceeded (40%), met (22%), growth (15%), absenteeism (10%), suspension (5%), ELPAC (5%), baseline (3%)

School archetypes in Diamond Bar

4 High Ceiling3 Strong All-Around2 Building Momentum

Archetypes are data-driven labels based on Scope Score dimensions. Learn more

Schools in Diamond Bar ranked by Scope Score

#SchoolScoreCountyExceededMet+AbsentSusp.
1Chaparral Middle
Walnut Valley Unified High Ceiling
86Los Angeles58.3%81.6%3.4%0.3%
2Diamond Bar High
Walnut Valley Unified Strong All-Around
82Los Angeles46.3%72.3%10.9%1.0%
3Maple Hill Elementary
Walnut Valley Unified High Ceiling
82Los Angeles60.6%82.6%4.4%0.1%
4Pantera Elementary
Pomona Unified High Ceiling
79Los Angeles52.6%76.6%4.7%0.1%
5Evergreen Elementary
Walnut Valley Unified Strong All-Around
74Los Angeles47.2%72.1%5.6%0.1%
6Quail Summit Elementary
Walnut Valley Unified High Ceiling
74Los Angeles52.3%79.3%6.9%0.5%
7Castle Rock Elementary
Walnut Valley Unified Strong All-Around
68Los Angeles42.9%71.1%6.9%0.2%
8Armstrong Elementary
Pomona Unified Building Momentum
45Los Angeles21.4%39.9%20.9%1.8%
9Golden Springs Elementary
Pomona Unified Building Momentum
40Los Angeles18.7%50.5%17.6%1.0%

Data source: California Department of Education · CAASPP 2024-25 · Methodology

Scores are SchoolScope's analysis of public data, not official CDE ratings. They represent one way of interpreting test results and should not be the sole basis for school decisions.

Private Schools in Diamond Bar

Private schools don't participate in California's standardized testing (CAASPP) and cannot be scored or ranked. Showing enrollment, student-teacher ratio, and affiliation where available.

Mt. Calvary Lutheran School
Greek Orthodox · Grades Pre-K-8 · 154 students
17:1Private
Guide Academy
Nonsectarian · Grades Pre-K-9 · 38 students
3:1Private
St. Christopher-Joseph-Aquinas Academic Academy
Roman Catholic · Grades Pre-K-6 · 35 students
35:1Private
Diamond Bar Montessori Academy
Nonsectarian · Grades Pre-K-1 · 30 students
10:1Private
Landmark Christian Preschool
Brethren · Grades Pre-K-TK · 26 students
7:1Private

What Scope Scores can't tell you about Diamond Bar

  • Class sizes and student-teacher interaction quality
  • Quality of arts, music, athletics, and enrichment programs
  • Teacher experience, turnover, and professional development
  • Campus safety, bullying climate, and social-emotional support
  • Parent and community engagement levels
  • Quality of special education and gifted programs
  • How school zones and enrollment boundaries affect access

Scope Scores measure academic performance and school climate using public data. They are one lens among many. Full methodology

Frequently asked questions

Are the schools in Diamond Bar good?
Diamond Bar's 9 ranked elementary schools average a Scope Score of 70.0/100, which is 26.2 points above the California state average of 43.8. 44.5% of students exceed the state standard on average (state average: 21.6%). The Scope Score weights six dimensions: exceeded standard (40%), met standard (22%), grade-level growth (15%), chronic absenteeism (10%), suspension rate (5%), and ELPAC proficiency (5%). Data source: California Department of Education CAASPP 2025, analyzed by SchoolScope.
What is the best elementary school in Diamond Bar?
The highest-scoring elementary school in Diamond Bar is Chaparral Middle with a Scope Score of 86/100 and 58.3% of students exceeding the state standard. Rankings are based on SchoolScope's 2025 Scope Score, which measures academic performance and school climate using publicly available California data. See full methodology.
How do Diamond Bar schools compare to the state average?
Diamond Bar elementary schools average a Scope Score of 70.0 vs. the statewide average of 43.8 (26.2 points above). The exceeded rate averages 44.5% vs. 21.6% statewide. Chronic absenteeism averages 9.0% vs. 18.1% statewide. Scores range from 40.2 to 86.0, a 45.8-point spread.
How many schools are in Diamond Bar?
Diamond Bar has 9 ranked elementary schools with Scope Scores. Schools are ranked using a weighted composite of CAASPP test performance, growth trajectory, chronic absenteeism, and suspension rate. Schools with insufficient testing data are not ranked.
What does the Scope Score measure?
The Scope Score is SchoolScope's proprietary composite rating (0–100) based on six dimensions of publicly available California school data: the exceeded-vs-met standard split, overall proficiency, grade 3–5 growth, chronic absenteeism, suspension rate, and ELPAC English Learner proficiency. Unlike single-number ratings, the Scope Score separates students who "exceeded" from those who "met" the standard — revealing whether a school pushes students beyond proficiency or paces toward it. Full methodology and weights.

Related

All California SchoolsTop Schools in Diamond BarWalnut Valley UnifiedPomona Unified

Plus 28 licensed preschools. Browse preschools in Diamond Bar →

← Explore all schools