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Very Good

#607 of 1,815 schools in CO

Top 33% in state

Horizons K-8 School

Elementary School · Boulder Valley School District No. Re2

4545 SIOUX DRIVE, Boulder, CO 80303

Charter

Enrollment

361

Student-Teacher

15:1

Score

7.1

Grades

Kindergarten – 8th

Updated 2022-23

How this school compares

In Boulder

#22 of 29

public schools

Colorado elementary schools

#410 of 1,006

In district

#41 of 54

Boulder Valley School District No. Re2

Academic performance

8.9 / 10

Exceptional

About Horizons K-8 School

Horizons K-8 School serves 361 students in kindergarten through eighth grade as a charter alternative school in Boulder, Colorado. With 24 full-time equivalent teachers, the school maintains a favorable 15:1 student-teacher ratio that allows for more individualized attention in the classroom. The school demonstrates strong academic performance, earning a 7.7 out of 10 MySchoolScout rating and ranking #131 out of 1,831 schools statewide, placing it in the 93rd percentile among Colorado schools.

This impressive ranking reflects the school's 8.7 out of 10 academic score. In mathematics, 52% of students achieve proficiency or above across all grade levels. As an alternative charter school, Horizons K-8 likely offers a distinctive educational approach compared to traditional public schools, though it maintains the same grade span as typical elementary schools.

The school draws from Boulder's well-educated community, where 80% of residents hold bachelor's degrees or higher. Located on Sioux Drive in Boulder's 80303 ZIP code, Horizons K-8 sits in a neighborhood where the median household income is $74,255 and median home values reach $891,000. Despite the area's overall affluence, the community includes economic diversity, with a 22.7% poverty rate among the ZIP code's 24,865 residents.

The school operates within Boulder's vibrant mid-size city environment, offering families an alternative educational option in this highly educated Colorado community.

What Parents Should Know

Horizons K-8 School is a charter school — a publicly funded school that operates with more autonomy than traditional district schools. Charter schools often have distinct educational models or specialties. Parents should understand the school's specific mission, enrollment process, and how its approach differs from nearby district options.

Score Breakdown

Full Profile · 3/3 metrics
Student Progress5.6Average50%
Year-over-year improvement in student test scores.
View breakdown
Years of Data4
Annual Change-0.67 pts/yr
Data Period2019–2025
TrendStable
Academics8.9Excellent30%
Student proficiency on state tests, adjusted for community poverty levels.
View breakdown
Math Proficiency54.6%
Reading/ELA Proficiency70.7%
Math vs. State Avg+18.5 pts
Reading vs. State Avg+25.8 pts
Overall Proficiency63%
Expected (poverty-adj.)56%
vs. Expected+6.9 pts
Adjusted Percentile83th
College ReadinessNot Available

Data not available for this school

Resources & Environment8.2Excellent20%
Student-teacher ratio, per-pupil spending, and attendance.
View breakdown
Student-Teacher Ratio15:1
Per-Pupil Spending$15,316

Horizons K-8 School — Students at Horizons K-8 School score 63% proficient, which is above what's typical for similar communities (expected: 56%).

How we calculate scores →

Equity & Diversity

Shown separately, not included in overall score

Free/Reduced Lunch

13%

Students qualifying for federal meal assistance

Test Scores CO CMAS (2024-25)

Math Proficiency 54.3%
School
State
37.4%
ELA Proficiency 70.9%
School
State
45.5%

Based on 19 test records from CO state assessments. About our data

Proficiency Trend

→ Stable

Average proficiency (% at or above grade level) across Math & ELA over time.

2019
Math
57%
ELA
77%
2021*
Math
54.5%
ELA
67%
2022
Math
52%
2025
Math
54.2%
ELA
70.7%

* COVID-affected year — test participation was uneven nationwide. This data is weighted at 50% in the Growth score calculation.

Source: EdFacts (NCES) and state assessment data. Growth score: 5.6/10.

How Horizons K-8 School Compares

See how Horizons K-8 School performs across key quality dimensions compared to state benchmarks.

Overall Score
7.1/10
67th percentile in CO
Academic
8.9/10
8.9/10
Growth
5.6/10
Above average
Environment
8.2/10
Above average

Funding & Resources

Free/Reduced Lunch
Students eligible for subsidized meals
13%
Teaching Staff
15:1 student-teacher ratio
24 teachers

Location

4545 SIOUX DRIVE, Boulder, CO 80303

Nearby Alternatives

Families considering Horizons K-8 School may also want to explore other elementary schools in the area. Creekside Elementary School at Martin Park (rated 9.3/10, 0.7 miles away), which scores notably higher. Another option is Eisenhower Elementary School (rated 9.0/10, 1.0 miles away), which scores notably higher. Additionally, High Peaks Elementary School (rated 8.9/10, 0.8 miles away), which scores notably higher. For more schools in Boulder, see our Boulder schools guide .

Nearby Schools

20 within 2.5 mi
School Distance Rating
Manhattan Middle School of the Arts and Academics Boulder 0.5 mi 8.5
BIXBY SCHOOL Boulder 0.7 mi 6.3
Summit Middle Charter School Boulder 0.7 mi 8.3
High Peaks Elementary School Boulder 0.8 mi 8.9
Boulder Community School/Integrated Studies Boulder 0.8 mi 4.9
Creekside Elementary School at Martin Park Boulder 0.7 mi 9.3
COUNTRYSIDE MONTESSORI SCHOOL Boulder 0.8 mi
Eisenhower Elementary School Boulder 1.0 mi 9.0
Community Montessori School Boulder 1.1 mi 7.9
Southern Hills Middle School Boulder 1.4 mi 7.6
Fairview High School Boulder 1.5 mi 7.4
Bear Creek Elementary School Boulder 1.6 mi 6.8
Nevin Platt Middle School Boulder 1.6 mi 8.0
New Vista High School Boulder 1.7 mi 5.5
Mesa Elementary School Boulder 1.9 mi 7.8
JAY & ROSE PHILLIPS EARLY CHILDHOOD CENTER Boulder 2.0 mi
University Hill Elementary School Boulder 2.0 mi 8.6
Boulder High School Boulder 2.4 mi 7.1
Whittier Elementary School Boulder 2.6 mi 5.2
Arapahoe Ridge High School Boulder 2.5 mi 6.3

Neighborhood Census ACS (2019-2023)

Census data for ZIP 80303 (ACS 2019-2023 5-Year Estimates) · Data sources

Median Income

$77,344

Median Home Value

$941,600

Median Rent

$1,833/mo

Population

24,934

College Educated

78.9%

Homeownership

45.5%

Avg Commute

19.1 min

Poverty Rate

23.6%

Median Age

29.8

Community Profile

The community surrounding Horizons K-8 School has a median household income of $77,344. It is a well-educated community where 79% of adults hold a bachelor's degree or higher. The median home value in the area is $941,600, with a median rent of $1,833/month. The area has a poverty rate of 23.6%, indicating some economic challenges in the community. Residents enjoy a short average commute of 19 minutes. Source: U.S. Census ACS 2022 5-Year Estimates.

Similar Schools

Schools in the same state with comparable level, size, and ratings

School Rating
AVE MARIA CATHOLIC SCHOOL Parker, CO 7.1
Douglass Valley Elementary School Usaf Academy, CO 7.1
Eaton Elementary School Eaton, CO 7.1
Greenwood Elementary School Greenwood Village, CO 7.1
Ignacio Elementary School Ignacio, CO 7.1
Indian Peaks Elementary School Longmont, CO 7.1

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 is ranked #607 out of 1,815 schools in CO.

What is Horizons K-8 School's MySchoolScout rating?

Horizons K-8 School has a composite rating of 7.1 out of 10 on MySchoolScout. This score combines academic performance, student growth, and school environment into a single score. Equity data is shown separately for context.

What are the test scores at Horizons K-8 School?

Based on the most recent state assessment data, Horizons K-8 School has 54.3% math proficiency and 70.9% reading/ELA proficiency.

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.

11 schools nearby View map →

Neighborhood Context

City Safety
High (3,086/100K)

FBI UCR 2024. City-level (Boulder). Data >1 year old.

Quick Facts NCES CCD (SY 2022-23)

Grades
Kindergarten – 8th
Enrollment
361
Student-Teacher Ratio
15:1
Teachers (FTE)
24
Free/Reduced Lunch
13.0%
Type
alternative
Setting
Midsize City
County
Boulder County
Data Year
2023–2024

How We Rate Schools

Every school receives a composite score from 1 to 10 based on four pillars: Academic Performance (50%), Student Growth (20%), Equity (15%), and Learning Environment (15%). Scores are built from publicly available data including standardized test results, enrollment figures, and school climate indicators.

Read our full methodology

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