Excellent

#37 of 574 schools in SD

Top 6% in state

Castlewood High School - 01

High School · Castlewood School District 28-1

310 E Harry St, Castlewood, SD 57223

Last updated: July 2026

Enrollment

106

Student-Teacher

15.1:1

Score

8.6

Grades

9th – 12th

Enrollment

106

Student-Teacher

15.1:1

Score

8.6

Grades

9th – 12th

Data vintage
2022-23

Data vintage2022-23

How this school compares

South Dakota schools

#37 of 574

In Castlewood

#1 of 3

public schools

In district

#1 of 3

Castlewood School District 28-1

Academic performance

9.7 / 10

Excellent

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Start with these real page-level signals, then use the full table and map below.

High School in Castlewood · grades 9th – 12th. Start here, then compare fit against nearby and district options.

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About Castlewood High School - 01

Castlewood High School - 01 is a public high school in Castlewood, SD, part of Castlewood School District 28-1. Castlewood High School - 01 serves approximately 106 students, and covers grades 9th-12th, and has a 15.1:1 student-teacher ratio. Castlewood High School - 01 has a current MySchoolScout rating of 8.6 out of 10 and ranks #37 of 574 schools in SD.

Structured state assessment records for Castlewood High School - 01 show 50% math proficiency (multi-year average, 2009-2022) and 74% reading/ELA proficiency (multi-year average, 2009-2022).

How it compares1.9 pts above SD schools

8.6

This school 8.6 · Excellent
SD avg 6.7

What Parents Should Know

At 106 students, Castlewood High School - 01 is on the smaller side. That usually buys more individual attention and teachers who know every kid by name, with the trade-off of fewer electives and extracurriculars than a larger school can staff. Ask what activities it actually offers.

Castlewood High School - 01 sits in a rural area, which can mean longer drives for some families. Rural schools are often community anchors with smaller classes, but check transportation, after-school options, and access to specialized services before you commit.

Score Breakdown

Full Profile · 4/4 metrics

Student Progress9.5Excellent25%

Year-over-year improvement in student test scores.

View breakdown

Years of Data13

Annual Change-0.43 pts/yr

Data Period2009–2022

TrendStable

Academics9.7Excellent25%

Student proficiency on state tests, adjusted for community poverty levels.

View breakdown

Math Proficiency75% (2022 EdFacts)

Reading/ELA Proficiency75% (2022 EdFacts)

Overall Proficiency75% (2022 EdFacts, Math+ELA)

Expected (poverty-adj.)53% (model expectation from 2022 EdFacts)

vs. Expected+22.4 pts

Adjusted Percentile95th

College Readiness8.5Excellent30%

Graduation rates, AP course participation, and IB availability.

View breakdown

4-Year Graduation Rate80%+

IB ProgramNo

Resources & Environment6.1Average20%

Student-teacher ratio, per-pupil spending, and attendance.

View breakdown

Student-Teacher Ratio15.1:1

Per-Pupil Spending$10,964

Chronic Absenteeism9.4%

Castlewood High School - 01 — Students at Castlewood High School - 01 score 75% proficient, which is above what's typical for similar communities (expected: 53%).

How we calculate scores →

Equity & Diversity

Shown separately, not included in overall score

Free/Reduced Lunch

13.2%

Students qualifying for federal meal assistance

Test Scores SD EDFACTS (2021-22)

Math Proficiency 50.1% (multi-year average, 2009-2022)

School

State

N/A

ELA Proficiency 73.9% (multi-year average, 2009-2022)

School

State

N/A

Based on 26 test records from SD state assessments. About our data

Proficiency Trend

→ Stable

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

2009

Math

69.5%

ELA

69.5%

2010

Math

49.5%

ELA

69.5%

2011

Math

69.5%

ELA

69.5%

2012

Math

75%

ELA

75%

2014

Math

24.5%

ELA

75%

2015

Math

30%

ELA

69.5%

2016

Math

69.5%

ELA

90%

2017

Math

30%

ELA

90%

2018

Math

30%

ELA

69.5%

2019

Math

30%

ELA

69.5%

2020*

Math

49.5%

ELA

69.5%

2021*

Math

49.5%

ELA

69.5%

2022

Math

75%

ELA

75%

* 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: 9.5/10.

How Castlewood High School - 01 Compares

See how Castlewood High School - 01 performs across key quality dimensions compared to state benchmarks.

Overall Score

8.6/10

94th percentile in SD

Academic

9.7/10

Excellent

Growth

9.5/10

Excellent

Environment

6.1/10

Average

Advanced STEM

2/5

Subjects offered

Funding & Resources

Free/Reduced Lunch

Students eligible for subsidized meals

13%

Teaching Staff

15:1 student-teacher ratio

7 teachers

Chronic Absenteeism

Students missing 15+ days per year (SY 2022-23)

9.4%

Programs & Offerings

Advanced STEM Courses2 of 5 advanced subjects offered

Algebra II, Advanced Math, Calculus, Chemistry, Physics·CRDC 2021-22

Data as of 2021-22 · Source: CRDC via Urban Institute · Learn more

Location

310 E Harry St, Castlewood, SD 57223

Nearby Alternatives

Families considering Castlewood High School - 01 may also want to explore other high schools in the area. GREAT PLAINS LUTHERAN HIGH SCHOOL (rated 7.2/10, 13.7 miles away, in nearby Watertown), a more accessible option. Another option is Watertown High School - 01 (rated 5.9/10, 12.7 miles away, in nearby Watertown), a more accessible option. Additionally, Estelline High School - 01 (rated 5.7/10, 12.2 miles away, in nearby Estelline), a more accessible option. For more schools in Castlewood, see our Castlewood schools guide .

Nearby Schools

20 within 13.8 mi

School	Distance	Enrollment	Rating
Castlewood Elementary - 02 Castlewood	0.0 mi	144	7.0
Castlewood Middle School - 03 Castlewood	0.0 mi	73	5.3
Claremont Colony Elementary - 04 Castlewood	3.9 mi	15	—
POINSETT COLONY ELEMENTARY SCHOOL Estelline	8.5 mi	5	—
Roosevelt Elementary - 08 Watertown	12.4 mi	148	4.2
Watertown High School - 01 Watertown	12.7 mi	1,222	5.9
IMACULATE CONCEPTION Watertown	12.6 mi	162	7.1
Watertown Intermediate School - 13 Watertown	13.1 mi	556	7.6
Lincoln Elementary - 05 Watertown	13.3 mi	338	8.0
Estelline Elementary - 02 Estelline	12.1 mi	136	4.7
Estelline High School - 01 Estelline	12.2 mi	86	5.7
Estelline Middle School - 03 Estelline	12.2 mi	53	5.8
Mellette Elementary - 07 Watertown	13.4 mi	235	7.5
GREAT PLAINS LUTHERAN HIGH SCHOOL Watertown	13.7 mi	133	7.2
McKinley Elementary - 06 Watertown	13.3 mi	255	6.9
ST MARTINS LUTHERAN SCHOOL Watertown	13.7 mi	123	5.4
Watertown Middle School - 02 Watertown	14.0 mi	587	6.2
WATERTOWN CHRISTIAN SCHOOL Watertown	13.8 mi	60	6.2
Jefferson Elementary - 09 Watertown	14.2 mi	332	5.4
Hamlin Middle School - 02 Hayti	13.8 mi	182	4.5

Neighborhood Census ACS (2019-2023)

Census data for ZIP 57223 (ACS 2019-2023 5-Year Estimates) · Data sources

Median Income

$88,571

Median Home Value

$229,500

Median Rent

$1,096/mo

Population

1,367

College Educated

25.1%

Homeownership

88.3%

Poverty Rate

2.2%

Median Age

36.9

Similar Schools

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

School	Enrollment	Rating
Kadoka Area High School - 01 Kadoka, SD	70	8.6
Chester High School - 01 Chester, SD	103	8.7
Faulkton High School - 01 Faulkton, SD	76	8.4
Irene - Wakonda High School - 01 Irene, SD	78	8.4
Florence High School - 01 Florence, SD	95	8.8
Philip High School - 01 Philip, SD	100	8.8

Frequently Asked Questions

Common questions about Castlewood High School - 01

What grades does Castlewood High School - 01 serve?

Castlewood High School - 01 serves students in grades 9th through 12th.

How many students attend Castlewood High School - 01?

Castlewood High School - 01 has an enrollment of approximately 106 students.

What is the student-teacher ratio at Castlewood High School - 01?

The student-teacher ratio at Castlewood High School - 01 is 15.1:1. A lower ratio generally means more individual attention per student. The national average is approximately 16:1 for public schools.

How does Castlewood High School - 01 rank in SD?

Castlewood High School - 01 ranks #37 of 574 schools in SD.

What is Castlewood High School - 01's MySchoolScout rating?

Castlewood High School - 01 has a current MySchoolScout rating of 8.6 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 Castlewood High School - 01?

Based on loaded state assessment records, Castlewood High School - 01 has 50% math proficiency (multi-year average, 2009-2022) and 74% reading/ELA proficiency (multi-year average, 2009-2022).

Is Castlewood High School - 01 a charter school?

No, Castlewood High School - 01 is not a charter school. It is a traditional public school operated by the local school district.

Is Castlewood High School - 01 a Title I school?

No, Castlewood High School - 01 is not currently a Title I school.

What does the Free & Reduced Lunch percentage mean for Castlewood High School - 01?

13.2% of students at Castlewood High School - 01 qualify for free or reduced-price lunch. This is a commonly used indicator of economic need and provides important context when interpreting test scores.