Excellent
#158 of 1,815 schools in CO
Top 9% in state
Horizons K-8 School
Elementary School · Boulder Valley School District No. Re2 · Boulder, CO
A Boulder Valley School District No. Re2 charter elementary school where students score 7 points above what's typical for similar communities.
4545 SIOUX DRIVE, Boulder, CO 80303
- Math 54% vs CO 37% (2025)
- Reading 71% vs CO 46% (2025)
- 15:1 student-teacher ratio
Academics
Full Profile · 3/3 metricsView breakdown
View breakdown
View breakdown
Students at Horizons K-8 School score 63% proficient, which is above what's typical for similar communities (expected: 56%).
2025 CMAS proficiency
Most recent published year. School vs. CO average.
Trend
→ SteadyProficiency is down 36 points across the 17-year record (2009–2025) and has held near 62% recently.
Show all 15 years
Multi-year averages used by the rating model: math 63% (multi-year average, 2009-2025) · reading/ELA 76% (multi-year average, 2009-2025)
* COVID-affected year — test participation was uneven nationwide. This data is weighted at 50% in the Growth score calculation.
Based on 41 test records from CO state assessments and EdFacts (NCES).
Equity & diversity
Shown separately, not included in the overall scoreFree/reduced lunch
13%
Students qualifying for federal meal assistance
How we rate schools
A clear 1–10 score built from public data — growth, academics, and learning environment. No hidden criteria, no pay-to-play.
See how we rateThe neighborhood
Where Horizons K-8 School sits, and what the surrounding area looks like.
Nearby same-level schools are colored by their score. Pins are locations, not attendance boundaries.
Getting around & local context
- Walk 57Somewhat Walkable
- Transit 44Some Transit
- Bike 93Biker’s Paradise
- City Safety: High3,086/100K
Powered by
FBI Uniform Crime Reporting · 2024 · city context (Boulder), not school-level safety or attendance eligibility. Source details
Source period: 2024. Freshness not available.
Area profileU.S. Census ACS 5-year estimates (ACS 2019–2023 5-year estimates)
Median income
$77,344
Median home value
$941,600
Median rent
$1,833/mo
College educated
78.9%
Homeownership
45.5%
Poverty rate
23.6%
ACS 2019–2023 5-year estimates for the ZCTA associated with school ZIP 80303; this is area context, not an attendance boundary.
Programs & students
Programs & Offerings
Compare nearby
Nearby same-level schools
4 from a 5-mile search; district fallback available
| School | Score | Grades | Distance | Enrollment | Compare |
|---|---|---|---|---|---|
| Bixby SchoolPrivate · tuition | 6.3private | PK–5 | 0.7 mi | 91 | Compare → |
| Creekside Elementary School at Martin ParkEnrollment path unverified | 9.3 | PK–5 | 0.7 mi | 368 | Compare → |
| Boulder Community School/integrated StudiesEnrollment path unverified | 7.8 | K–5 | 0.8 mi | 265 | Compare → |
| Countryside Montessori SchoolPrivate · tuition | Not rated | PK–K | 0.8 mi | 11 | Compare → |
Distance is proximity only; it is not attendance eligibility.
Private · tuition: Potential private option; tuition and admission requirements have not been verified.
Enrollment path unverified: Potential public school; its attendance or application path has not been classified.
Public and private scores come from different models and are shown side by side, not blended into one ranking.
Boulder Valley School District No. Re2
- Schools in district
- 56
- Rank in district
- #17 of 54
- District spending per student
- $17,172NCES F-33 · FY 2023 · This annual source is three years behind the current year.
- District child poverty rate
- 6.0%Census SAIPE · 2024
Horizons K-8 School is listed in Boulder Valley School District No. Re2; a district label does not verify attendance for an address.
About Horizons K-8 School
Horizons K-8 School is a public elementary school in Boulder, CO, part of Boulder Valley School District No. Re2, serving approximately 361 students in grades Kindergarten-8th with a 15:1 student-teacher ratio. It holds a MySchoolScout rating of 8.5 out of 10 and ranks #158 of 1,815 schools in CO.
State assessment records show 63% math proficiency (multi-year average, 2009-2025) and 76% reading/ELA proficiency (multi-year average, 2009-2025).
Frequently asked questions
Common questions about Horizons K-8 School
What grades does Horizons K-8 School serve?
Horizons K-8 School serves students in grades Kindergarten through 8th.
How many students attend Horizons K-8 School?
Horizons K-8 School has an enrollment of approximately 361 students.
What is the student-teacher ratio at Horizons K-8 School?
The student-teacher ratio at Horizons K-8 School is 15:1. A lower ratio generally means more individual attention per student. The national average is approximately 16:1 for public schools.
How does Horizons K-8 School rank in CO?
Horizons K-8 School ranks #158 of 1,815 schools in CO.
What is Horizons K-8 School's MySchoolScout rating?
Horizons K-8 School has a current MySchoolScout rating of 8.5 out of 10. This score combines the level-appropriate components shown in the rating breakdown; equity data is shown separately for context.
What are the test scores at Horizons K-8 School?
Based on loaded state assessment records, Horizons K-8 School has 63% math proficiency (multi-year average, 2009-2025) and 76% reading/ELA proficiency (multi-year average, 2009-2025).
Is Horizons K-8 School a charter school?
Yes, Horizons K-8 School is a charter school. Charter schools are publicly funded but independently operated, often with more flexibility in curriculum and teaching methods.
Is Horizons K-8 School a Title I school?
No, Horizons K-8 School is not currently a Title I school.
What does the Free & Reduced Lunch percentage mean for Horizons K-8 School?
13.0% of students at Horizons K-8 School qualify for free or reduced-price lunch. This is a commonly used indicator of economic need and provides important context when interpreting test scores.
School factsNCES Common Core of Data (CCD) (SY 2023–24)
- Grades
- Kindergarten – 8th
- Enrollment
- 361
- Student-Teacher Ratio
- 15:1
- Teachers (FTE)
- 24
- Type
- alternative
- Setting
- Midsize City
- County
- Boulder County
- Chronic Absenteeism (SY 2022-23)
- 18.3%
- Phone
- (720) 561-5580
- Area population (ZIP 80303)
- 24,934
- Area average commute
- 19.1 min
- Area median age
- 29.8
About this school's data
Every number on this page comes from a published source with a stated period. Where a source is partial, aging, or describes a surrounding area rather than the school, that limitation is named below.
- School directory (enrollment, grades, staff, contact)
- NCES Common Core of Data (CCD) · SY 2023–24 · Medium confidence
- Source period: SY 2023–24. A newer release may be available.
- MySchoolScout rating and rank
- MySchoolScout ranking model · Low confidence
- Vintage not available. Do not use this measure alone.
- Derived as a weighted blend of the component scores shown in Academics from state assessment, EdFacts growth, and NCES resource records.
- Math proficiency
- State department of education · 2025 CMAS · Low confidence
- Vintage not available. Do not use this measure alone.
- Available for part of the eligible units; results may not represent the full area.
- Derived from source records rather than read directly from one field.
- Reading/ELA proficiency
- State department of education · 2025 CMAS · Low confidence
- Vintage not available. Do not use this measure alone.
- Available for part of the eligible units; results may not represent the full area.
- Derived from source records rather than read directly from one field.
- Student progress (growth)
- NCES EdFacts · Mixed source periods · Low confidence
- Vintage not available. Do not use this measure alone.
- Available for part of the eligible units; results may not represent the full area.
- Derived as the fitted year-over-year slope of proficiency from multi-year assessment records.
- Neighborhood (income, housing, education)
- U.S. Census ACS 5-year estimates · ACS 2019–2023 5-year estimates · Low confidence
- Older source: ACS 2019–2023 5-year estimates. Use as historical context.
- Reported for the ZCTA for ZIP 80303; this does not measure the attendance area.
- Programs (AP/IB, athletics, gifted)
- CRDC via Urban Institute · SY 2021–22 · Medium confidence
- Available for part of the eligible units; results may not represent the full area.
- Source period: SY 2021–22. A newer release may be available.
Evidence periods: Rating mixed/unknown input periods; assessments multi-year average, 2009-2025; directory SY 2023–24
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